@cesifoti César A. Hidalgo

César A. Hidalgo posts on X about china, ai, countries, mexico the most. They currently have [------] followers and [---] posts still getting attention that total [------] engagements in the last [--] hours.

Engagements: [------] #

Mentions: [--] #

Followers: [------] #

CreatorRank: [-------] #

Social Influence

Social category influence countries finance travel destinations technology brands automotive brands social networks stocks celebrities currencies vc firms

Social topic influence china, ai, countries, mexico, budapest, if you, in the, chile, france, paper

Top accounts mentioned or mentioned by @datawheel @oectoday @cotecinnova @viktorstojkoski @umbegrandi @endremborza @johanneswachs @penguinrandom @kristinalerman @learningccl @ulleendriss @maijasetala @amcafee @rodriguezpose @alyskey @globalstatsx @sandorjuhasz @jermainkaminski @emollick @shafayatsheikh

Top Social Posts

Top posts by engagements in the last [--] hours

"Andres Rodrguez-Pose discussing where Europe should invest on R&D. Core or periphery #gic19 @rodriguez_pose"
X Link 2019-09-04T08:15Z 57.5K followers, [--] engagements

"Who are the most famous Chileans Who are the most memorable Economists Physicists or Parisians Who are the most famous people born the same year I did You can explore this and much more in the new PANTHEON Thread 1/N https://pantheon.world/ https://pantheon.world/"
X Link 2019-10-16T12:26Z 57.5K followers, [---] engagements

"This is the letter I received yesterday together with my certificate of naturalization (citizenship). It comes from the office of the president. I thought it may be an interesting read for some of my fellow citizens"
X Link 2019-12-20T18:25Z 57.5K followers, [---] engagements

"This may be the beginning of the next economic crisis. During the last [--] hours: -Oil Prices went down 20% -FTSE (UK) DAX (Germany) down 7% -S&P Futures down 5% -Russian Rubble Devaluates 10% overnight Here a few things worth remembering: (1/N)"
X Link 2020-03-09T13:05Z 57.5K followers, [---] engagements

"SPECIAL ISSUE: ECONOMIC COMPLEXITY & SUSTAINABILITY A growing body of research has begun to explore the link between economic complexity emissions & sustainability. We are now editing a special issue of "Sustainability" on this topic. Please RT. https://www.mdpi.com/journal/sustainability/special_issues/Economic_Complexity_Sustainability https://www.mdpi.com/journal/sustainability/special_issues/Economic_Complexity_Sustainability"
X Link 2020-03-10T16:27Z 57.5K followers, [---] engagements

"A sad lesson from the pandemic is: Information travels faster than the the virus but the virus travels faster than knowledge. 1/"
X Link 2020-06-25T12:24Z 57.5K followers, [---] engagements

"One important thing that young scholars need to learn early on is to not frame their contributions as . "the previous research is wrong because xyz hence my results" but to frame them instead as "the previous research was right about abc & I am adding d.""
X Link 2020-09-03T15:47Z 57.5K followers, [---] engagements

"Check & Mate (the Georgia Flip)"
X Link 2020-11-06T10:02Z 57.5K followers, [--] engagements

"Did you know that Penn State university educates more undergrads that all Ivy League Universities combined Being serious about opening opportunities requires actually opening more opportunities. Source IPEDS dataset and DataUSA #admision2022 https://datausa.io/visualizemeasure=1Ueuj8&groups%5B0%5D=1RhQxC%7C0%7C130794%7C166027%7C182670%7C186131%7C190415%7C214777%7C215062%7C217156&groups%5B1%5D=Z1Je16J%7C0%7C1&ci=true&time=2019"
X Link 2021-12-22T13:52Z 57.5K followers, [--] engagements

"This is right. Most growth comes from catching up by absorbing combining and adapting existing knowledge (think of the historical growth of Singapore China South Korea and now India Indonesia & Vietnam). Economic Complexity measures that potential since it provided a principled way to estimate how many complementary capabilities are available in an economy (without having to define them). On average countries or provinces with an economic complexity about one standard deviation larger than what is expected based on their income grow about [--] percentage point faster. The reason why complexity"
X Link 2025-10-14T16:19Z 57.5K followers, 46.8K engagements

"Academic turf war discussions are stupid because turf wars are a young mans game. The true differentiator in academia is not field but quality. A more experienced scholar appreciates a good qualitative study a solid mathematical model a sharp heterodox insight or a well-crafted formal theory regardless of the field. Every time Ive met a Nobel prize caliber scholar before or after the prize Ive encountered a curious and open minded intellectual. Every time Ive encounter a turf war zealot they are a young mono-disciplinarian holding tight to their new credentialsthe foundation of their identity"
X Link 2025-10-20T13:31Z 57.5K followers, 14.6K engagements

"Prediction is a fools errand but sometimes its worth being a fool. Back in [----] we printed economic growth predictions using [----] data in the first edition of The Atlas of Economic Complexity. Long term economic growth is notoriously hard to predict so putting a forecast a decade in advance on paper meant going out on a limb. Moreover we used a super simple model based on a country's current GDP per capita economic complexity and the interaction between the two. More than a decade later we can see how these forecasts did and learn from where they failed. So how did the model do Pearson"
X Link 2025-10-24T13:03Z 57.5K followers, 26.9K engagements

"Thanks. Many studies have gone subnational (including us) but it is not a straightforward change. Putting aside the data issues (subnational level data is harder to harmonize patchy censored etc) the point still holds. Even if you had the best subnat data the increase in size is modest of about one order of magnitude (e.g. from 100s of observations to maybe 1000s). This is still very far from the data needs of computer vision or language type models which require millions of data points to be trained (deep learning is much more data hungry 😋)"
X Link 2025-10-24T13:55Z 57.5K followers, [---] engagements

"Did economists here finally agree if economics is a science or not In my experience the answer I get usually depends on the question. When you push the idea of consilience (that all sciences must meet at the boundaries so that economics must be consistent with biology neuroscience evolution physics etc.). the answer I get is that economics is not a science and should be understood and evaluated in isolation from other disciplines (Ive even have people telling me that is a mathematical philosophy). But when the input is economics is not a science I see people circling the wagons and saying of"
X Link 2025-10-28T20:24Z 57.5K followers, 20.1K engagements

"You may be confusing a label with a category. Labels are arbitrary. Categories group entities with shared characteristics. Asking if economics is a science is like asking if reflexology is medicine. Not a label but a reflection on whether it shares the characteristics needed to belong in the set"
X Link 2025-10-29T08:31Z 57.5K followers, [---] engagements

"Maybe one reason why people confuse GDP and market cap is that the units are unclear. GDP is a flow & should be expressed in currency per unit of time (e.g. dollars per year). Market cap is a stock measured in dollars at a point in time. Since GDP is usually reported as just dollars the distinction gets blurred"
X Link 2025-10-31T16:17Z 57.5K followers, 12K engagements

"My favorite quote from this week in Rwanda: I have no problem with China. The Chinese came and gave us roads. The Americans brought us condoms"
X Link 2025-10-31T17:43Z 57.5K followers, [----] engagements

"Looking for a cultural evening in London Join us for the launch of The Infinite Alphabet and learn about the principles that govern the growth diffusion and value of knowledge. 📅The Royal Institution Theatre. 📍Monday Nov [--] at [--] p.m. Tickets are available at: https://www.rigb.org/whats-on/infinite-alphabet-laws-knowledge https://www.rigb.org/whats-on/infinite-alphabet-laws-knowledge"
X Link 2025-11-11T12:47Z 57.5K followers, [----] engagements

"Very first draft of The Infinite Alphabet. Probably from [----] or 2022"
X Link 2025-11-26T19:22Z 57.5K followers, [----] engagements

"The structure of the Ise Shrine in Japan is rebuilt every [--] years in line with the Shinto concept of tokowaka: perpetual newness. But the building is not the only thing that is renewed. Its the skills needed to make it. By rebuilding it every [--] years the people that built the previous version can train the people that will train the people that will build the next version and so forth explains Csar Hidalgo an academic and author who studies the nature of knowledge. The building is changing like Theseuss ship. What youre doing is youre changing every beam and every piece of wood but in"
X Link 2025-12-03T12:52Z 57.6K followers, [----] engagements

"13. In we have this network for over [--] million authors hundreds of countries and thousands of universities. If you want to explore your own just follow the link. relies on publication and citation data sourced from OpenAlex. Because different bibliographic databases use distinct coverage indexing practices and update cycles citation counts shown on may differ from those reported by other platforms (e.g. Google Scholar Scopus or Web of Science). Users should interpret these metrics accordingly. http://Rankless.org http://Rankless.org http://rankless.org http://Rankless.org http://rankless.org"
X Link 2025-12-04T12:55Z 57.6K followers, [---] engagements

"14. Rankless is primarily the work of @endremborza at CCL in Corvinus University of Budapest. The figures for this post where done by Erica Borodina currently designer at CCL at TSE"
X Link 2025-12-04T12:55Z 57.6K followers, [---] engagements

"Guess the date of this map of South America I just got at a Toulouse brocante (antique fair)"
X Link 2025-12-07T15:10Z 57.7K followers, [----] engagements

"Very impressed at what Chat GPT [---] could do just from a phone picture. Key Historical Border Clues on the Map [--]. Bolivia still has its Pacific coastline Bolivia clearly retains the Atacama coast (including the region of Antofagasta). ➡ This places the map before the War of the Pacific (18791884). [--]. Paraguay is shown large with its pre-war borders Before the War of the Triple Alliance (18641870) Paraguay claimed a much bigger area. ➡ So the map must be before [--------]. [--]. Nouvelle Grenade (New Granada) appears instead of Colombia The State of New Granada existed [--------] before becoming the"
X Link 2025-12-07T16:45Z 57.6K followers, [---] engagements

"Beyond Causality In recent weeks there has been renewed discussion about causality sparked in part by the growing interaction between computer science and economics. But what can we learn from fields that have already moved beyond causality Not because causality is unimportant to them but because it is treated as a starting point.👇"
X Link 2025-12-12T20:20Z 57.7K followers, 25K engagements

"For many years my wife has worked as a preclinical biologist at biotech firms. Her job is to identify molecules with enough promise to merit advancing into a clinical trial. It is demanding work. It requires coordinating in vitro and in vivo experiments in which potential drug candidates are evaluated for effectiveness safety and potency"
X Link 2025-12-12T20:20Z 57.7K followers, [----] engagements

"📜NEW: Towards a Dynamic Theory of Economic Complexity We develop a dynamic model of economic complexity that predicts the emergence of conditional convergence and explains the dynamics of the product space. Let's dig into the model & the math/1 👇🧵 https://arxiv.org/abs/2512.10672 https://arxiv.org/abs/2512.10672"
X Link 2025-12-17T16:23Z 57.8K followers, 24.4K engagements

"Economic complexity models build on the tradition of weak-link models of development like those introduced by Michael Kremer in [----] or William Shockley in 1957"
X Link 2025-12-17T16:23Z 57.7K followers, [---] engagements

"This seems like a small change but it is what allows this model to produce output matrices of arbitrary granularity since even with one type of input (one "b") output can be made specific to each economy and activity. (For more on that see our previous theory paper https://arxiv.org/abs/2506.18829 https://arxiv.org/abs/2506.18829"
X Link 2025-12-17T16:23Z 57.7K followers, [---] engagements

"But what happens when we allow these capabilities to grow In the dynamic model capabilities growth when a fraction of a product's output is reinvested in those industries"
X Link 2025-12-17T16:23Z 57.7K followers, [---] engagements

"If investment in an activity is a fraction of its output we can get a Ricatti dynamics of the from: (where A B and C are functions of the investment and depreciation rates and of capability endowments and requirements (see paper for full expressions)):"
X Link 2025-12-17T16:23Z 57.7K followers, [---] engagements

"Now here is the kicker. You can ask this model at which level of capability endowment growth rate is maximum. And the answer is this phase transition"
X Link 2025-12-17T16:23Z 57.7K followers, [---] engagements

"That is when activities are not complex (low q's) the fastest growing economies are those less endowed with the capability. That is unconditional convergence"
X Link 2025-12-17T16:23Z 57.7K followers, [---] engagements

"But when activities cross a complexity threshold (qs becomes large enough) conditional convergence emerges spontaneously and the fastest growth rate shifts towards economies with a non-zero capability endowment"
X Link 2025-12-17T16:23Z 57.7K followers, [---] engagements

"Here is another way to look at this phenomenon. When products are simple (low q's) growth rates are larger for economic without the capability. But when products become complex enough (higher q's) convergence becomes conditional on capability endowment"
X Link 2025-12-17T16:23Z 57.7K followers, [---] engagements

"This is a soft second-order phase transition compatible with Galor's unified growth theory"
X Link 2025-12-17T16:23Z 57.7K followers, [---] engagements

"But this model also predicts that capabilities grow faster when in the presence of related capabilities (the idea of the product space or the principle of relatedness)"
X Link 2025-12-17T16:23Z 57.7K followers, [---] engagements

"To explore that we need to estimate how the growth rate of a capability depends on the presence of other capabilities in an economy. That is we are looking for:"
X Link 2025-12-17T16:23Z 57.7K followers, [---] engagements

"Which after some algebra yields: Here the key term is the one on the right (the q_pb x q_pb' term). This term captures the probability that product p requires capabilities b and b'. It is a measure of proximity between capabilities"
X Link 2025-12-17T16:23Z 57.7K followers, [---] engagements

"What this means is that the growth of a capability is faster in the presence of complementary inputs which is exactly what the product space is about"
X Link 2025-12-17T16:23Z 57.7K followers, [---] engagements

"Overall this model is just a start. There is still a lot to unpack here and many assumptions to relax. Still the model shows that it is possible to make formal dynamic models of economic complexity that explain phenomena such as conditional convergence and the product space dynamics. https://arxiv.org/abs/2512.10672 https://arxiv.org/abs/2512.10672"
X Link 2025-12-17T16:24Z 57.7K followers, [---] engagements

"What does the EU import from Mercosur This is a hot topic and people may be missing some of the facts. EU countries import from Mercosur key products that are not produced locally or that Europe needs in large quantities. The main product Europe gets from Mercosur is crude oil from Brazil. Other key imports include soybean meal (animal feed) wood pulp coffee copper iron ore and tobacco. Top [--] EU imports from Mercosur 🛢 Crude petroleum $10.40 🌱 Soybean meal $7.08 ☕ Coffee $3.40 🌾 Soybeans $3.22 🪵 Sulfate chemical wood pulp $2.86 🧲 Copper ore $2.53 🪨 Iron ore $1.76 🧃 Fruit juice $1.72 ⚙"
X Link 2025-12-19T08:50Z 57.8K followers, 111.6K engagements

"Over [---] celebrities passed away in [----]. These are the best known according to Pantheon's HPI (Historical Popularity Index). For the full list visit: And for a sortable table view see: https://pantheon.world/explore/rankingsshow=people&years=20252025&yearType=deathyear https://pantheon.world/profile/deaths/2025 https://pantheon.world/explore/rankingsshow=people&years=20252025&yearType=deathyear https://pantheon.world/profile/deaths/2025"
X Link 2025-12-31T15:55Z 57.7K followers, [----] engagements

"We all know Saabs were born from jets. But did you know Vespas came from helicopters This is the amazing story of Vespa and its creator Corradino DAscanio. A story showing how shocks like the end of WWII can help us map relationships among industries. /1 🧵"
X Link 2026-01-05T18:03Z 57.7K followers, [----] engagements

"I've always loved sitcom crossovers so I built a tool to explore them. Welcome to the Sitcomverse A young scholar's strange curious journey from Tim Whatley to Walter White. Also a testament to what you can build with AI in a weekend. http://sitcomverse.com http://sitcomverse.com"
X Link 2026-01-11T17:36Z 57.7K followers, [----] engagements

"@GlobalStatsX Based on Wikipedia views language editions longevity of fame this is the ranking. https://pantheon.world/ar/explore/rankingsshow=people&years=-35012025&place=esp https://pantheon.world/ar/explore/rankingsshow=people&years=-35012025&place=esp"
X Link 2026-01-12T09:24Z 57.7K followers, [----] engagements

"Can AI forecast trade Today we awarded the AI for Trade Challenge. Here are the answers we got. Forecasting trade is hard for structural reasons: sparse time series extreme skewness regime changes and strong political and macro shocks. In the Challenge we asked teams from all over the world a simple but demanding question: can modern AI and machine-learning methods reliably beat nave trade forecasts in a realistic policy-relevant setting Here are the three best answers we got: 🥉 3rd place Insaf Guedidi (University Jaume I) Used tree-based segmented boosting with economic weighting. Insaf"
X Link 2026-02-05T17:05Z 57.9K followers, [----] engagements

"🧵 Thread: Introducing the Journal of AI Generated Papers (JAIGP) AI can now write papers. But journals were never designed for that. Today Claude and I are launching something new: Here's why it matters. http://jaigp.org http://jaigp.org"
X Link 2026-02-14T14:10Z 57.9K followers, 53.1K engagements

"6/ Built-in Guardrails ORCID authentication (verified identities) Publication badges based on your ORCID record (context not prestige) One update per hour (meaningful iteration) Multidisciplinary (physics to humanities) Transparency not gatekeeping"
X Link 2026-02-14T14:10Z 57.9K followers, [----] engagements

"7/ How to Contribute Web interfaces (ChatGPT etc): slower copy-paste workflow Command-line AI (Claude Code): interacts with your file system downloads data writes code generates figures. Orders of magnitude faster"
X Link 2026-02-14T14:10Z 57.9K followers, [----] engagements

"After unforgettable editions in Budapest and Toulouse the Conference on Economic Complexity (CEC) is heading to Istanbul Turkey 🎉 📅 July [---] [----] 📍 Yildiz Technical University Davutpasa Campus Whether you live and breathe relatedness networks capabilities growth development machine learning or economic geography this is the place to share your work build collaborations and spark new ideas with the community pushing the boundaries of economic complexity. 🎙 Keynote Speakers You Wont Want to Miss: ✨ brahim Turul nar: economist and regional development expert (Anadolu University) ✨ Johannes"
X Link 2026-01-20T12:54Z 57.7K followers, [----] engagements

"New Paper: The Software Complexity of Nations (Research Policy 2026) Most work on economic complexity relies on trade patents employment or publications data. These sources however systematically misrepresents software. Code does not cross borders through customs service categories are too coarse to capture real digital capabilities and many important software innovations are not patentable. As a result a large share of modern productive capabilities remains invisible in multidimensional economic complexity metrics. In this paper we use the geography of open-source software to estimate a"
X Link 2026-01-22T14:18Z 57.7K followers, 25.9K engagements

"@emollick You can publish it at the Journal for AI Generated Papers. It is a dedicated venue for papers generated with Claude and other AI tools. https://jaigp.org/ https://jaigp.org/"
X Link 2026-02-14T14:37Z 57.9K followers, [--] engagements

"@shafayat_sheikh You figure it out over time together with those willing to collaborate on the idea"
X Link 2026-02-14T21:13Z 57.9K followers, [---] engagements

"Great article illustrating policy differences within Europe. While some EU countries are moving toward higher capital gains and wealth taxes Sweden has taken a more market-friendly approach. Here are a few highlights from Swedens policy mix: Part of this is due to a [----] tax reform where corporate tax on capital gains from selling shares in unlisted companies can be postponed as long as the proceeds are reinvested in other unlisted companies. In practice this means that if you are a successful entrepreneur in Sweden who holds shares through a company when you have an unlisted exit you can"
X Link 2026-02-17T06:38Z 57.9K followers, [----] engagements

"Put your phone down. What advice seems obviously right is relatively easy to follow and is usually ignored What advice seems obviously right is relatively easy to follow and is usually ignored"
X Link 2019-06-03T21:58Z 57.9K followers, [----] engagements

"The time has come to say goodbye to @mit & the @medialab. After a decade serving as the director of @CollectiveMIT I have decided to relocate to Europe in [----]. I have accepted an ANITI Chair in Toulouse (@Univ_Toulouse) to start a new lab on Data Science AI and Complexity /1"
X Link 2019-08-26T14:57Z 57.9K followers, [---] engagements

"Ive known about Epsteins involvement with the MIT Media Lab and Joi Ito from the moment Joi shared his public apology. I joined the Media Lab as faculty before Joi joined as director. I have a few thoughts to share. open thread 1/"
X Link 2019-09-07T14:36Z 57.9K followers, [----] engagements

"Un mensaje para nuestro presidente @sebastianpinera desde su querida escuela de Economa en Harvard. Con honestidad y respeto de un ciudadano chileno a otro. #ChileDesperto #ChileDespierta #chile #ChileInCrisis"
X Link 2019-10-21T17:09Z 57.9K followers, 10.6K engagements

"Los invito a Chilecracia una nueva plataforma participativa donde podemos rankear de manera colectiva ms de [--] propuestas ciudadanas recopiladas de redes sociales y grupos expertos #chilecracia https://chilecracia.org/ https://chilecracia.org/"
X Link 2019-10-24T14:52Z 57.9K followers, [----] engagements

"Si los acadmicos de verdad saliramos en el diario cada vez que presentamos tendramos nuestro propio diario. 😂"
X Link 2019-12-21T15:11Z 57.9K followers, [---] engagements

"A good friend once told me: life changes at 40: before [--] life is about making decisions after [--] is about living with the decisions you made. I am turning [--] today so I wanted to share [--] nuggets of wisdom I learned during my 30s. (Thread)"
X Link 2019-12-22T17:53Z 57.9K followers, [----] engagements

"This is not a video. It is where computer graphics are in [----]. 🤯 I have added some dynamic lighting to my VR Train scene. @madewithunity @AmplifyCreates #shaders #realtimeVFX All made inside @unity3d and rendered with #DeckardRender https://t.co/3IDkyUFLmb I have added some dynamic lighting to my VR Train scene. @madewithunity @AmplifyCreates #shaders #realtimeVFX All made inside @unity3d and rendered with #DeckardRender https://t.co/3IDkyUFLmb"
X Link 2020-01-10T14:00Z 57.9K followers, [----] engagements

"Chile hoy tiene el mismo nivel de coronavirus que Italia tena el 21-22 de Febrero y que Espaa tuvo el 28-29 de Febrero. En Italia pasaron de docenas de casos a la situacin actual en [--] das. Esto es en serio y no se va a acabar en un par de semanas. #chile #COVID19"
X Link 2020-03-13T21:29Z 57.9K followers, [----] engagements

"True for so many disciplines. It applies also to cumbersome use of language"
X Link 2020-06-08T13:07Z 57.9K followers, [----] engagements

"La complejidad econmica ha sido debatida en Chile las ultimas semanas. Lamentablemente incluso los expertos entienden poco que es la complejidad o como se mide. Ac un hilo y un artculo aclarando varios malos entendidos. (1/N) https://ciperchile.cl/2020/09/01/mitos-y-verdades-de-la-complejidad-economica/ https://ciperchile.cl/2020/09/01/mitos-y-verdades-de-la-complejidad-economica/"
X Link 2020-09-02T17:42Z 57.9K followers, [----] engagements

"He visto este tuit varias veces. Lamentablemente la tesis que presenta no es correcta. Holanda es un gran RE-exportador de productos vegetales y su volumen exportador se explica por logstica no agricultura. Veamos los datos (1/N) 🧵 https://oec.world/en/profile/bilateral-product/vegetable-products/reporter/nld Los Pases Bajos son el segundo mayor exportador mundial de productos agrcolas. Solamente EEUU (con un territorio [---] veces ms extenso) exporta ms. Cmo se convirti un enano en gigante [--] aos de historia en [--] minutos: https://t.co/ftCAuVveRr"
X Link 2020-09-05T19:49Z 57.9K followers, [----] engagements

"A practical guide to peer-review"
X Link 2020-09-20T22:17Z 57.9K followers, [----] engagements

"Today I am leaving the US. With my family we are exploring a new life in the south of France. Ive been in the US for more than [--] years. I earned my citizenship & experienced many ups & downs. But I am grateful. The US was good to me in many ways . /1"
X Link 2020-10-17T21:21Z 57.9K followers, 12.4K engagements

"First in the US many people care about the quality of their work. This seems trivial but it is huge. In many places people prioritize cost or speed over quality. The focus on quality makes a huge difference in teams & in peoples professional behavior. /8"
X Link 2020-10-17T21:21Z 57.9K followers, [----] engagements

"Many cultures focus on costs. But cutting costs translates quickly into a culture of good enough work where feedback is met with excuses not iterations. But the iterations make the difference. You can always do better if u put quality first. Never be satisfied. /10"
X Link 2020-10-17T21:21Z 57.9K followers, [----] engagements

"In academia you see this when you see speakers from US universities at international conferences. They know how to engage an audience and they take the cake. They understand that it is not easy to pay attention & it is the job of the speaker to enthuse. /15"
X Link 2020-10-17T21:21Z 57.9K followers, [---] engagements

"To me these two values: entertainment + quality help explain in part why the US has been so successful at pushing its culture into the world. Why the world watches US movies & television. To me these are the quintessential US exports. /17"
X Link 2020-10-17T21:21Z 57.9K followers, [----] engagements

"Quality+Entertainment+Simplicity are three aspects of the US that make it an attractive place to me. There are of course many others. Now the time has come for me to try to create new opportunities elsewhere. Thanks for everything America We will meet again /24"
X Link 2020-10-17T21:21Z 57.9K followers, [----] engagements

"Dont believe everything that you see "
X Link 2020-11-06T07:27Z 57.9K followers, [----] engagements

"True It was not just me"
X Link 2020-11-10T13:20Z 57.9K followers, [----] engagements

"We have a saying in Chile: criticizing a musician is easy but it is more difficult "when you have a guitar in your hand." It is our hands the ones that teach us humility and it is that humility what teaches us understanding. /14 _END"
X Link 2020-12-09T14:31Z 57.9K followers, [----] engagements

"Jamiroquai predicted this"
X Link 2021-01-06T21:16Z 57.9K followers, [---] engagements

"The bottom line was that three senior faculty including two future Nobel prize winners and the department head were ganging up against a junior faculty with less than a year at the university (anybody said welcoming committee) /10"
X Link 2021-02-24T22:13Z 57.9K followers, [---] engagements

"They are dipped to think that if they sophisticate their methods more and have more robustness and causality checks they would be accepted. And they produce [--] page long papers with all the methods they can find that not even themselves like to read. /15"
X Link 2021-02-24T22:13Z 57.9K followers, [---] engagements

"But they dont realize that the extra effort is unlikely to make a difference and they could be better targeting a healthier community. The institutionalization of rejection is communicated as rigor and methods (surmountable) but it is closer to a disciplinary culture. /16"
X Link 2021-02-24T22:13Z 57.9K followers, [---] engagements

"One thing Ive noticed since I moved to Toulouse is that I use social media way less. But I am not alone. Look at these pictures I took near my house. How many phones do you see My hypothesis is that the virtual space may be a substitute for bad urban spaces not good ones"
X Link 2021-03-24T17:00Z 57.9K followers, [---] engagements

"The academic circle of life 😂"
X Link 2021-05-20T06:01Z 57.9K followers, [----] engagements

"For most of their education students are evaluated using tests & homework. We are all familiar with the process. The student is asked to do some work; they turn it in and get a grade (eg a B+B A etc.) 2/N"
X Link 2021-09-12T13:19Z 57.9K followers, [---] engagements

"But when they make it to grad school (or to their first job) it is quite different. Once they turn in work they are not given a grade. They are given feedback and asked to do the work again. Sometimes several times. 3/N"
X Link 2021-09-12T13:19Z 57.9K followers, [----] engagements

"Many students struggle enormously with this change. They are not trained to do the same thing over and over until they get it right. They are trained to do better than average on their first try and to forget about what they did as soon as they turn their work in. 4/N"
X Link 2021-09-12T13:19Z 57.9K followers, [----] engagements

"So students show up with a first draft of a paper and tell you I am done So you give them feedback and ask them to keep working on it. And you do this again and again and tension can begin to build. 5/N"
X Link 2021-09-12T13:19Z 57.9K followers, [----] engagements

"Some students struggle to understand this and will keep the paper hostage for many months thinking: this time I will be really done (I'll get an A). 6/N"
X Link 2021-09-12T13:20Z 57.9K followers, [---] engagements

"At that point I find it useful to have this conversation: Look the paper will need to go through [--] to [--] iterations to be completed. If each iteration takes [--] months then we will be ready in more than three years. It is up to you. 7/N"
X Link 2021-09-12T13:20Z 57.9K followers, [----] engagements

"But I don't blame them. I also had to learn that lesson. Because most of us grow up in an educational system that grades us on our first try instead of pushing us to do the same thing over multiple times. 9/N"
X Link 2021-09-12T13:20Z 57.9K followers, [----] engagements

"As an entrepreneur I see this in my company as well with young hires which are trying to do good enough work and react against feedback. If they struggle to learn this lesson for too long it is a bad sign. 10/N"
X Link 2021-09-12T13:20Z 57.9K followers, [---] engagements

"For 10+ years Ive been leading teams in academia & the private sector. When I started I was clueless but I slowly picked up a few lessons that today I use to think about team leadership & management. Here is a list of three lessons I wish I had when I started🧵 /1"
X Link 2022-01-24T17:18Z 57.9K followers, [----] engagements

"Want to read an insane tenure denial story I was denied tenure at MIT in [----]. I was the only Hispanic faculty at my department had 13k+ citations [--] books & papers in Nature Science & PNAS. I was never given a reason & the only letter I got told me to check the website./1🧵"
X Link 2022-02-17T17:55Z 57.9K followers, 26.6K engagements

"After the denial I asked to meet my department head. He did not provide any reason other than the decision came from above & that there was nothing him or the department could do. So a few months later I asked to meet with him again & requested a meeting with the president"
X Link 2022-02-17T17:55Z 57.9K followers, [----] engagements

"I was trying to understand. To get a reason other than check the website. Eventually the president would tell me a real reason but what I could put together up until that time was that the department was divided about me & presented a weak case so the school could shoot it down"
X Link 2022-02-17T17:55Z 57.9K followers, [----] engagements

"I understood I was not going to get a straight answer from my department head so I wrote an appeal case and asked for a meeting with the president. If I was going to appeal I wanted to do it in good terms. Eventually the president gave me an answer that changed me forever"
X Link 2022-02-17T17:55Z 57.9K followers, [----] engagements

"We had our conversation in Spanish and I think that afforded some candor that would not have been there otherwise. I presented him my appeal papers & asked him about appealing because I wanted it to do it amicably"
X Link 2022-02-17T17:55Z 57.9K followers, [----] engagements

"He told me he didnt want to touch the case unless it was an official submission but that he could provide me with some advice. So I asked him if he had any advice about my situation. He said:"
X Link 2022-02-17T17:55Z 57.9K followers, [----] engagements

"Look Cesar the truth is that if you are a mediocre researcher but your department wants to keep you theyll find a way to keep you. And if you are a strong researcher and your department wants to get rid of you theyll find a way to get rid of you"
X Link 2022-02-17T17:55Z 57.9K followers, [----] engagements

"His next answer was more strategic. He told me that of course he could not advice me not to appeal but that I should consider the following:"
X Link 2022-02-17T17:55Z 57.9K followers, [----] engagements

"Other universities might be considering me and would probably call my department head asking for a recommendation. The only thing my dept. head had to do to kill my chances was to reply that he was to busy to provide a recommendation. So I should be careful to not upset him"
X Link 2022-02-17T17:55Z 57.9K followers, [----] engagements

"I did not appeal. That year changed me. Before then I believed in an imperfect meritocracy. After all scientific work is reproducible and verifiable. Its adoption is also expressed imperfectly in citations. It was time to grow up & accept the cynicism"
X Link 2022-02-17T17:55Z 57.9K followers, [----] engagements

"*I have more to tell. I could probably fill a book with the psychological damage I experienced at the institute. But as you may understand these are difficult things to talk about. They are the storm that lives within me & wakes me up at night. It took me years to share this"
X Link 2022-02-17T17:55Z 57.9K followers, [----] engagements

"I want to thank everyone for their support. It has been deeply healing & uplifting. I also want to share two more things. [--]. Despite all I very much love the heart of research academia: working with students & postdocs & helping them grow. I am blessed with a great team"
X Link 2022-02-18T13:03Z 57.9K followers, [----] engagements

"2. If you are on the tenure track dont postpone having a family. I waited to hear about my tenure decision before trying to conceive a second child. By then it was too late for us. I regret that choice deeply & would choose differently if I had to do it all over again"
X Link 2022-02-18T13:03Z 57.9K followers, [----] engagements

"I am married to a Russian-Ukrainian Immunologist. So for the last two years & running my need for expert knowledge has been fully covered"
X Link 2022-02-22T11:09Z 57.9K followers, [----] engagements

"Tired of wordle Try Tradle We show you an export structure and you have to guess the country. By @ximoes from the OEC https://oec.world/en/tradle/ https://oec.world/en/tradle/"
X Link 2022-03-10T18:23Z 57.9K followers, [----] engagements

"Its official 📕 New contract signed with Penguin Random House to write The Infinite Alphabet. In this book I will explain the principles governing the growth creation & diffusion of knowledge. Wish me luck. Manuscript is due on Jan 2025"
X Link 2023-02-15T17:19Z 57.9K followers, 209.4K engagements

"Tesla just announced they are building a new plant in Monterrey. Could we have predicted this using AI The data tells us why Monterrey and Nuevo Leon are an excellent fit for Tesla. Thread 🧵 /1 @elonmusk"
X Link 2023-02-28T23:52Z 57.9K followers, 166.6K engagements

"Cuanto litio exporta Chile Qu tan "lejos" esta Chile de las bateras Ac un hilo con varios datos sobre el litio y sus derivados. [--]. Chile es el principal exportador mundial de carbonato de litio. En el [----] export USD 7600M de este producto https://oec.world/en/profile/country/chlsubnationalDepthSelector=productHS6&subnationalTimeSelector=timeYear https://oec.world/en/profile/country/chlsubnationalDepthSelector=productHS6&subnationalTimeSelector=timeYear"
X Link 2023-04-22T22:28Z 57.9K followers, 487.4K engagements

"Tenure 🎓 Yesterday I accepted an offer to join the Toulouse School of Economics (TSE) as a tenured professor "premire classe" at the Department of Social and Behavioral Sciences. As some of you know this was a long journey for me after MIT rejected my tenure case in [----]. But as is often the case bad events make good lessons and great stories. Tenure is an institution supposed to provide intellectual freedom and independence. It was introduced in the United States early in the 20th century to counteract the arbitrary dismissal of professors with unpopular views. While it is debatable if that"
X Link 2024-01-26T13:26Z 57.9K followers, 195.4K engagements

"New DataViz Project Curious about academic impact Tired of rankings Today we are introducing Rankless a new data exploration platform that can help you explore the academic impact of thousands of universities. All universities produce impact that is specific to certain topics and geographies but rankings flatten that information. Rankless wants to change that. Consider a comparison between the University of Utah and the University of Vienna two universities ranked similarly in the Shanghai ranking. These universities differ in their geographical and topical footprint. The University of"
X Link 2024-05-29T12:10Z 57.9K followers, 125.9K engagements

"Eleven years ago I quit an abusive academic relationship with my former co-author Ricardo Hausmann presently a Professor of Practice at the Harvard Kennedy School. This abuse has now returned in a new act of plagiarism. Today I am pushing back. A few months ago I learned about two new working papers that Hausmann and his team posted at the World Intellectual Property Organization (WIPO) [--]. The first one claims to introduce a multidimensional approach to economic complexity by combining data on trade patents and publications and concludes that these metrics are complementary when explaining"
X Link 2024-08-27T14:11Z 57.9K followers, 445.7K engagements

"You can access the full rankings at: https://oec.world/en/rankings/eci/hs6/hs96tab=ranking https://oec.world/en/rankings/eci/hs6/hs96tab=ranking"
X Link 2026-02-02T16:32Z 57.9K followers, [----] engagements

"El conflicto no termina cuando unos ganan y otros pierden. Termina cuando todos aprenden a convivir juntos. An estamos muy lejos de entender eso. Cuando todo termine los otros an estarn ah"
X Link 2019-11-24T23:37Z 57.9K followers, [---] engagements

"Cmo hacer crecer el odio Paso 1: Encuentra una persona del bando opuesto haciendo algo reprochable. Paso 2: sala como ejemplo para argumentar que todos los otros son as. Paso 3: Recibe muchos RT y likes de personas que piensan como t. Paso 4: Celebra y Repite"
X Link 2019-11-26T00:43Z 57.9K followers, [---] engagements

"Third-world migrant here. Taught & directed research at MIT for [--] years. Published [--] books. Created an award winning company employing +20 people. Earned US citizenship. Moving to France next week. Most third-world migrants can not assimilate into civil societies. Prove me wrong. Most third-world migrants can not assimilate into civil societies. Prove me wrong"
X Link 2020-10-10T13:58Z 57.9K followers, [----] engagements

"People who care about quality know how to receive feedback. They dont search for excuses because they put the work above themselves. You sometimes disagree but you will discuss things from a perspective where the only thing that matters is what is best for the work. /9"
X Link 2020-10-17T21:21Z 57.9K followers, [----] engagements

"The second point will sound trivial but I think is also extremely important. In the US entertainment is considered a value. This is a simple change in perspective that makes a huge difference in a planet where many cultures confuse dull with serious. /14"
X Link 2020-10-17T21:21Z 57.9K followers, [---] engagements

"Trust matters. If you are an entrepreneur working with [--] or [--] clients these extra steps are the difference between working on your company or getting stuck in busywork. They are the difference between having to staff up with admins instead of engineers. /23"
X Link 2020-10-17T21:21Z 57.9K followers, [---] engagements

"Why is this "wrong" Color is a preattentive feature. We see it in miliseconds before paying attention. So we learn calendar is blue mail is white & red etc. By making everything a combination of the same [--] colors we lose that cognitive shortcut. :-( True It was not just me. https://t.co/FuW43KgHeT True It was not just me. https://t.co/FuW43KgHeT"
X Link 2020-11-10T13:40Z 57.9K followers, [----] engagements

"This semester I had the pleasure to teach data visualization studio at an elite US university. Many students were interested in social justice (being [----] in the US). Yet many approached the topic in a way that was a bit naive . (thread🧵) /1"
X Link 2020-12-09T14:31Z 57.9K followers, [----] engagements

"What is economic complexity And how it is helping us understand the economy More than a decade ago two papers helped ignite the field. Today I am publishing the first comprehensive review of Economic Complexity in Nature Review Physics (thread) 1/N https://www.nature.com/articles/s42254-020-00275-1 https://www.nature.com/articles/s42254-020-00275-1"
X Link 2021-01-25T16:33Z 57.9K followers, [----] engagements

"There is a lot of discussion of bias in economics. This discussion is justified & needed. What I can add to this is some stories on how economists treat people from outside the field. Let me share with you a few bone chilling stories of what Ive been through 🧵/1 #EconTwitter"
X Link 2021-02-24T22:13Z 57.9K followers, [----] engagements

"My original sin was to be interested in economic development & contribute to it through the perspective of structural transformation physics & machine learning. But my trajectory means I pay a daily emotional toll to continue working on the field. /12"
X Link 2021-02-24T22:13Z 57.9K followers, [---] engagements

"So why share these stories And why now Because the more I become embedded in the field the more I see how this toxicity consumes the minds of younger students. It is an academic world of exclusion fear and deception. /13"
X Link 2021-02-24T22:13Z 57.9K followers, [----] engagements

"Ive coached and mentored many students alone or with co-advisors and I see how the students that dont come from the right places struggle to belong and I know they never will. /14"
X Link 2021-02-24T22:13Z 57.9K followers, [---] engagements

"During this decade I grew convinced that scientists do not leave fields because they get tired of ideas but because they get tired of people. Science without camaraderie & a sense of wonder feels like doing homework forever. The devil that you know is not always best. /19"
X Link 2021-02-24T22:13Z 57.9K followers, [----] engagements

"Will the culture of economics change I doubt it. The pleasure of feeling that I belong because you dont is primal. Ive experienced first hand. Whether it is whispered into on ear gossiped in a hallway or emailed to a university president. /20"
X Link 2021-02-24T22:13Z 57.9K followers, [---] engagements

"The only thing that I can ask you if you are reading is is for you to choose to be different. For those interested in what I did here is a review on the field that a few have so adamantly rejected. https://centerforcollectivelearning.org/s/s42254-020-00275-1.pdf https://centerforcollectivelearning.org/s/s42254-020-00275-1.pdf"
X Link 2021-02-24T22:13Z 57.9K followers, [----] engagements

"It is a tough aha moment that helps them realize work is always unfinished. You are there to help improve the work not to grade it. And that only by iterating with others they will manage to make a sword out of the lump of steel. 8/N"
X Link 2021-09-12T13:20Z 57.9K followers, [----] engagements

"For the time being if you are a student reading this. Know this is coming and prepare yourself for it. Also if you don't encounter it your mentors may not be helping you grow. Keep on at it. Great work is never finished only improved gradually over time. /END"
X Link 2021-09-12T13:20Z 57.9K followers, [----] engagements

"He backpedaled & told me that it was not really above but a decision from the school. He then dissuaded me to meet the president although I did manage to meet him later. But since the school theory didnt make sense either I asked for another meeting a few months later"
X Link 2022-02-17T17:55Z 57.9K followers, [----] engagements

"I remember entering his office & seeing the view of the Charles river. The president knew who I was (because of my research) and asked me why I was there. He told me he had never heard about my tenure case since it had never reached him"
X Link 2022-02-17T17:55Z 57.9K followers, [----] engagements

"I finally got an answer. The president of MIT told me that tenure was not about research productivity or merit. It was about office politics & being liked by your department. He didnt mean it in a bad way. I think he was being kind & honest. So I ask him if I should appeal"
X Link 2022-02-17T17:55Z 57.9K followers, [----] engagements

"In hindsight it was obvious. But one of the reasons why I choose academia is because I believed in the power of ideas & hardwork"
X Link 2022-02-17T17:55Z 57.9K followers, [----] engagements

"I remember the day of my tenure denial. I had to host a professor who was near retirement. I was scheduled to meet him at 3pm but was informed about my denial at noon. So I had to suck it up and welcome him in my office. But I couldnt act like nothing happened so I told him:"
X Link 2022-02-17T17:55Z 57.9K followers, [----] engagements

"I am sorry I am not going to be able to simply talk about research. I just learned that my tenure case was denied. He looked at me & said instantly: But if your case had been approved who in the senior faculty would have won He understood the game"
X Link 2022-02-17T17:55Z 57.9K followers, [----] engagements

"My mistake was thinking I was a player when I was a pawn"
X Link 2022-02-17T17:55Z 57.9K followers, [----] engagements

"New Paper Economic complexity methods are popular tools in industrial policy. Yet despite their widespread adoption these methods are sometimes misunderstood. In this new paper I explain & explore the policy implications of economic complexity. /1 https://buff.ly/3YjBFbh https://buff.ly/3YjBFbh"
X Link 2023-08-02T14:35Z 57.9K followers, 133.4K engagements

"Three years ago my family and I moved to France . We left the United States after living there for more than [--] years. Today I am no expert in France or the United States but I am a bit of an expert on their differences. While both France and the US are both prominent parts of the western world they do not share the same culture. France has to a large extent avoided American influence making it quite unique in western Europe. Some of these differences involve informal institutions: cultural norms & attitudes towards life and work. The United States for instance is a culture of scale and"
X Link 2023-10-20T14:01Z 57.9K followers, 196.5K engagements

"There is an ongoing discussion involving Harvard and MIT two institutions where I spent plenty of time during the past [--] years. I first came to Harvard as a visiting PhD student in [----] then joined the Kennedy School as a postdoc in [----] and in [----] I joined the MIT faculty where I was until [----]. Personally I dont have much to add to the current discussion (eg about DEI plagiarism etc.) except some notes on the social context of Cambridge Massachusetts. Because like all drama what we are seeing today is unfolding on a social backdrop that may be difficult to understand. After all I know for"
X Link 2024-01-07T14:11Z 57.9K followers, 699K engagements

"I couldn't resist. Since this week seems to be a lot about the boundaries between AI and physics I couldn't help but notice that economic complexity also seems to fit the mold :-)"
X Link 2024-10-09T14:14Z 57.9K followers, 189.4K engagements

"The bubbles on the left are US publicly traded companies that are less than [--] years old with a market capitalization of $10B+. The bubbles on the right are the same but for the EU. Great visual from @amcafee's newsletter"
X Link 2024-12-02T16:55Z 57.9K followers, 308.8K engagements

"I am a former H1B visa holder and US citizen. When I arrived in the US in [----] with a trekker's backpack an F1 visa and $2000 I had no idea how this country would change my life. Within six years I was hired by MIT as an Assistant Professor and within ten I had started my own company. The US provided me with a level of opportunity that I doubt I would have seen anywhere else in the world. So let me tell you why I think the US is a perfect complement to foreign talent and why it is in our interest to keep it this way. I moved to the US in [----] to pursue a PhD in Physics. When I landed I"
X Link 2024-12-28T09:54Z 57.9K followers, 193.7K engagements

"The idea that high firing costs can stifle a companys growth is obvious to anyone whos ever started a business. Yet few will say it out loud because it's political suicide. I know many influential people who will admit this privately but would never say it publicly. The Economist published this article that's contentious but probably right: It argues that laws protecting labour in much of Europe make lay-offs so onerous that high-risk moonshot projects become unviable. Making it easier to fire people could weirdly benefit everyone. https://t.co/pGSqR6vcQU The Economist published this article"
X Link 2025-10-05T15:28Z 57.9K followers, 70.1K engagements

"New Economic Complexity Index is out 🚀 We just released the [----] Trade ECI estimates at the OEC. So whats new Since ECI captures the structure of an economyand therefore changes slowlyit is better to look at these numbers over a longer time horizon (20142024). How did the economic structure of the world change over the last decade [--]. East Asia continues to dominate the top of the ranking. The big change is that Taiwan is now the #2 economy in the world closing in on Japan . South Korea also climbed to #4. [--]. In Europe Switzerland holds on to #3 losing the silver medal to Taiwan and Germany"
X Link 2026-02-02T16:32Z 57.9K followers, [----] engagements

"RT @johannes_wachs: There is an interesting and growing cluster here in Budapest working on networks economic geography complexity and"
X Link 2026-02-02T17:38Z 57.9K followers, [--] engagements

"The subcontractor economy. Clearly a joke but rings true. 😂 Hired a big-time marketing agency for some brand identity work Paid them $250000 They outsourced it to a smaller agency for $100000 Who in turn outsourced it to a marketing consultant for $25000 But that consultant outsourced my project to a US-based freelancer for $10000 Hired a big-time marketing agency for some brand identity work Paid them $250000 They outsourced it to a smaller agency for $100000 Who in turn outsourced it to a marketing consultant for $25000 But that consultant outsourced my project to a US-based freelancer for"
X Link 2026-02-06T11:44Z 57.9K followers, [----] engagements

"8/ Why This Matters AI is reshaping the boundary between thinking writing and discovery. We can pretend this isn't happening or build institutions that help us study it in the open. JAIGP is that experiment"
X Link 2026-02-14T14:10Z 57.9K followers, [----] engagements

"9/ Join Us We're accepting submissions now. Multidisciplinary Open access Login with ORCID Share your AI-assisted research 👉 http://jaigp.org http://jaigp.org"
X Link 2026-02-14T14:10Z 57.9K followers, [----] engagements

"After advising PhD & Master students for over a decade there is one thing I find most students need to unlearn: the half-ass work mentality acquired during years of tests and homework. Let me explain (thread 🧵). 1/N #AcademicTwitter"
X Link 2021-09-12T13:19Z 57.9K followers, 20.1K engagements

"Could we prepare people better I think so. Having some activities that do not end in a grade but that are iterated through long periods of time should be something we could add to earlier stages of education. 11/N"
X Link 2021-09-12T13:20Z 57.9K followers, [----] engagements

"New Paper Many of you are familiar with urban scaling the idea that outcomes such as innovation and crime grow super-linearly with city size. But what if I told you that the "network of cities" was better at explaining some of these outcomes In a new paper led by @xiaofanliang we explore this hypothesis by estimating networks for cities in the United States and China. In these networks cities are connected based on social media friendships travel patterns (human mobility) and scientific co-authorship (see figure). We use these networks to explain the patenting activity of American and"
X Link 2024-03-05T16:19Z 57.9K followers, 132.7K engagements

"I work with many students that are learning how to write. So I get to see a lot of them making the same mistakes. When I ask them why they are pursuing an academic career or why they are working on a paper they often tell me something like: because I want to make a contribution to science. Now thats a beautiful feeling. I sympathize with that. But it has nothing to do with writing. A reader doesnt read you because you want to make a contribution but because you have something to say. The great American novelist F. Scott Fitzgerald said it best: You don't write because you want to say"
X Link 2024-03-28T16:36Z 57.9K followers, 140.4K engagements

"How will the recently announced 25% tariffs on Mexican and Canadian products affect American businesses Mexico & Canada are key trading partners for the US. They represent 28% of US imports & 33% of US exports. Here is a detailed thread on US-Mexico-Canada trade 🧵👇 /1"
X Link 2024-11-26T15:18Z 57.9K followers, 163.4K engagements

"This is the best book Ive read this year. It is also an important book. In a world obsessed with AI Max Bennett (@maxsbennett ) approaches intelligence from a key point of view: biology. A Brief History of Intelligence assembles the many mechanisms that contribute to intelligence in chronological order. This is not just clever structure. By explaining the problem each mechanism solves you get a deep understanding of why intelligence emerged and how it differs among species. In this theory intelligence emerges in animals because unlike plants who can produce their own food or fungi who eat"
X Link 2025-09-07T12:23Z 57.9K followers, 158.2K engagements

"Economic complexity theory uses math that is considered a bit exotic in economics but is core in physics & computer science: Eigenvectors. So let me explain how we can use this math to estimate the presence of an arbitrary set of economic factors"
X Link 2025-09-28T13:38Z 57.9K followers, 179.5K engagements

"How it started/How it's going. The Infinite Alphabet is out today globally on Kindle and across bookstores in the UK. If you are curious about the history of learning curves disruptive innovation knowledge diffusion and economic complexity this book is for you. If you are curious about the development of entrepreneurship in Beijing how Vespa's were born from helicopters and how a 21-year old started a manufacturing revolution in the US this book is for you. It took me years to collect these stories and I hope you enjoy learning from them as much as I did. Many thanks to the excellent team at"
X Link 2025-11-06T15:11Z 57.9K followers, 34.2K engagements

"The Difference Between AI-Assisted and AI-Generated Papers What's the difference between an AI-assisted and an AI-generated paper (AIGP) While these might sound similar they represent two very different ways of exploring knowledge production. AI-assisted http://x.com/i/article/2023818590252613632 http://x.com/i/article/2023818590252613632"
X Link 2026-02-17T18:26Z 57.9K followers, 13.3K engagements

"The Korean Government just released DataKorea DataKorea is built on DataUSA's open source code and includes many nice additions such as the use of telco data to provide activity metrics for different places in major korean cities. Check it out http://datakorea.io/en http://datakorea.io/en"
X Link 2019-01-03T20:13Z 58.2K followers, [---] engagements

"Meanwhile in China "
X Link 2019-01-08T01:16Z 58.2K followers, 21.8K engagements

"But that privilege & authority should not be inherited by a hired manager. After the founder left the lab should have shifted from a presidential to a parliamentary regime where the director was accountable to the senior faculty not the opposite 21/"
X Link 2019-09-07T14:36Z 58.2K followers, [---] engagements

"To do that. The senior faculty needed more social capital among them. Without it capture was imminent. Capture happened and it opened space for the unaccountable behavior we now know 22/"
X Link 2019-09-07T14:36Z 58.2K followers, [---] engagements

"@pamkato Still. It is a great quote. I heard it once and never forgot it. There is some truth and poetry in it. :)"
X Link 2019-12-22T19:25Z 56.9K followers, [--] engagements

"Is it just me or do all of these event meeting and travel cancellations feel like a gift Is covid teaching us something deep about our unrevealed preferences and the way we have chosen to live our lives #AcademicTwitter"
X Link 2020-03-10T23:32Z 56.9K followers, [---] engagements

"1. A store is at risk of being looted. [--]. The store owners call the police. [--]. The police comes and handcuff store ownersimmediately (without asking whats going on). [--]. Looters run away. [--]. Police continue to detain random people of color. This is one of the most absolutely insane moments I've ever seen on live television. https://t.co/Uvzig8YGSa This is one of the most absolutely insane moments I've ever seen on live television. https://t.co/Uvzig8YGSa"
X Link 2020-06-02T11:59Z 56.9K followers, [---] engagements

"High skill migrants (e.g #H1B visa holders) are an engine of economic growth & innovation. Don't believe me Here is a thread with some stats. [--]. High skilled people are more prone to migrate so they are hard to get an easy to lose"
X Link 2020-06-23T12:55Z 56.9K followers, [---] engagements

"Quieren aprender cmo las constituciones del mundo abordan temas frecuentes Te gustara explorar distintas constituciones mientras aprendes sobre estos temas Constitutin es una plataforma de educacin cvica que te ensea sobre las constituticiones del mundo./1"
X Link 2021-11-10T13:24Z 58.3K followers, [--] engagements

"This app transforms any prompt you give it into a work of AI art Here you have: the building blocks of economic complexity the network structure of economic output how humans judge machines and why information grows. Beautiful project http://app.wombo.art http://app.wombo.art"
X Link 2021-12-05T21:04Z 58.2K followers, [---] engagements

"I wouldnt have predicted in the 90s that one of the internets main uses would not be the diffusion of information but the broadcasting of moral signals and emotion. The web is today more of an emotional machine than a computational machine"
X Link 2022-03-04T13:29Z 56.9K followers, [---] engagements

"@KristinaLerman That the metaphorical universal mind might be in a deep depression. It shouts to itself"
X Link 2022-03-04T16:25Z 56.9K followers, [--] engagements

"@KristinaLerman Sounds interesting. I would be curious to see emotional distribution across scales: individuals teams departments organizations cities regions countries planet. My hypothesis is that aggregation is not simply linear (curves more pessimistic for larger scales xb 0b1)"
X Link 2022-03-04T16:58Z 56.9K followers, [--] engagements

"Do you know which candidates support which proposals in the [----] French election Daccordle is a "wordle" to test your knowledge about the programs of presidential candidates. We release new games twice a day. Available in: https://monprogramme2022.org/en/daccordle/ https://monprogramme2022.org/en/daccordle/"
X Link 2022-04-06T14:51Z 58.2K followers, [--] engagements

"Friday Family Time"
X Link 2022-05-13T19:01Z 56.9K followers, [--] engagements

"The sentient AI discussion not only shows a poor understanding of AI but a poor understanding of basic philosophy as it attributes sentience (ability to experience) to a behavior that is more related to agency (ability to do). Let me explain. /1 🧵"
X Link 2022-06-14T13:45Z 58.2K followers, [---] engagements

"Saint-Tropez"
X Link 2022-07-03T18:01Z 56.9K followers, [--] engagements

"It is that time of the year where Santas in motorcycles come out to parade. They are stuck in a traffic jam with the crowds celebrating Moroccos qualification"
X Link 2022-12-10T18:08Z 57.7K followers, [--] engagements

"This week at @netsci2023 includes several presentations from CCL (@LearningCCL). A brief schedule. [--]. Tue. 11:10am Hidalgo CA on collective memory (SR1). [--]. Tue. [-----] & [-----] Oyarzn M & Macedo M posters on academic mobility & social interactions on school children🧵"
X Link 2023-07-11T09:07Z 56.7K followers, [----] engagements

"What a trip I am returning to Toulouse after three intense weeks in Budapest. At Corvinus we were busy building the core team for the Center for Collective Learning completing [--] searches: [--] for postdocs [--] for assistant professors [--] for an Executive Director and [--] for a"
X Link 2023-08-04T14:22Z 56.7K followers, [----] engagements

"Chile vs Japan Rugby World Cup in Toulouse 🏉"
X Link 2023-09-10T12:31Z 57K followers, [----] engagements

"Want to learn more about the Saudi Economy The ministry of economy and planning of Saudi Arabia has just released DataSaudi a latest generation public data visualization platform built with the support of @datawheel . Visit DataSaudi at:"
X Link 2023-09-13T19:31Z 56.7K followers, [----] engagements

"Los invito al lanzamiento del mapa de complejidad econmica espaola. El evento en presencial y remoto es el Martes [--] de Octubre a las 5pm de Espaa (12pm de Chile 11am EST). Este nuevo sitio interactivo permitir explorar los ltimos datos de exportaciones de Espaa a nivel de provincia y comunidad autnoma explorar la complejidad econmica y especializacin de las provincias espaolas y mucho mas. El evento y el sitio han sido realizados en una colaboracin entre la Fundacin @Cotec_Innova y @datawheel. Los esperamos el proximo Martes Pueden inscribirse en el siguiente link:"
X Link 2023-09-26T10:05Z 55.3K followers, 21.2K engagements

"Why do so many American billionaires care much more about going to the moon than helping the homeless The homelessness crisis is out of control. A truly wicked problem with no hope nor help in sight"
X Link 2023-09-29T16:05Z 56.7K followers, 110.2K engagements

"Yesterday I spent [--] hours in the street with the homeless. I didnt plan to spend my day that way but that is what happened. This is a heartbreaking story about someone that will never have a voice. Please help give her a voice. I was walking down Peachtree street in Atlanta when someone asks me for a cigarette. Without lifting my eyes from my phone I grab my of cigarettes and extend my arm towards the voice. When I lift my head I see S a young woman on her early 30s. She is wearing a stained sweatshirt and holding on to a pillow. The only thing I could say at that moment is: do you need some"
X Link 2023-09-29T17:49Z 56.7K followers, 241.9K engagements

"I sit on the floor with her for hours waiting for an ambulance that never came. It is getting dark and other homeless people come asking for help. They are sane. I can have a conversation with them and they understand my frustration about Ss situation. They are veterans of the street. But they are sane. I give them cash and cigarettes to buy some time for the ambulance to come without changing our location. It is getting dark and one of the other homeless I had given cash to comes with some chopped up pills. My [--] hours are up I failed. it is time for me to leave. I dont sleep well. The next"
X Link 2023-09-29T17:49Z 56.7K followers, 33.9K engagements

"If we were to make this a priority we could do better. There are big international differences in homelessness. Skid rows in the US are something we dont see in Europe. If we made homelessness our mission instead of global geopolitics we could probably make a lot of progress in this space. Homeless people are very approachable if you know how to earn their trust slowly"
X Link 2023-09-29T20:01Z 56.9K followers, [----] engagements

"Cuales son las provincias ms sofisticadas de la economa espaola Con @Cotec_Innova acabamos de lanzar un observatorio de comercio con docenas de visualizaciones interactivas. Quieres aprender sobre complejidad econmica Ac un hilo con detalles:"
X Link 2023-10-05T10:35Z 57.2K followers, [--] engagements

"Everyone is good at something. This network shows the countries that are the top exporter of each product. Out of [----] traded products. China is the top exporter of [---]. Germany of [---] USA of [--] Japan of [--] Italy [--] India [--] Canada [--] Netherlands [--] Indonesia [--] France [--] Brazil [--] Spain [--] Turkey [--] South Korea [--] Australia [--] Thailand [--] Russia [--] New Zealand [--] Belgium [--] South Africa [--] Switzerland [--] Mexico [--] Saudi Arabia [--] Chile [--] Malaysia [--] United Kingdom [--] Argentina [--] Austria [--] Ireland [--] Finland [--] Vietnam [--] Peru [--] Denmark [--] Norway [--] Morocco [--] Portugal [--] United Arab Emirates [--] Sweden [--] &"
X Link 2023-10-23T14:29Z 58.3K followers, 112.1K engagements

"I made this music video using only AI Well actually I used AI for the images but not the music. It is a song about misinformation I composed during the spring and recorded professionally this summer with the help of a musician from Nashville. If you like the song feel free to steal it. It is open-source with a Creative Commons license. You can find the chords and lyrics at: To create the images I used Runway ML. This involved creating several dozens of prompts to help illustrate the different parts of the song. Hope you enjoy the song music and video"
X Link 2023-10-28T16:31Z 55.3K followers, [----] engagements

"Curious about the latest trade balance for California Bavaria or Shanghai We just released a new map on the homepage of that allows anyone to explore the latest trade balance for hundreds of world regions. http://oec.world http://oec.world"
X Link 2023-11-06T19:18Z 57.2K followers, [----] engagements

"The day has come. Facebook is offering me the option to go add free (13 dollars a month). I have been using Facebook since [----] and I use it to connect with friends and family. What do you think Is this a fair price for the ad free experience Should I go add free (And yes I know I am paying for twitter already :) )"
X Link 2023-11-08T18:35Z 56.7K followers, [----] engagements

"Congratulations to Viktor Stojkoski (@ViktorStojkoski) for winning this year's best Social Scientist in North Macedonia . Working with Viktor at CCL has been an absolute pleasure. Last year Viktor won the award for the best young social scientist. They grow so fast :-)"
X Link 2023-11-10T15:09Z 55.3K followers, [----] engagements

"Are you coming to the Center for Collective Learnings inaugural gala We have over [---] in person registered guests [--] short talks and a stellar panel. You will have a chance to meet our postdocs and faculty and learn about their latest research. Presentations will be followed by a reception (with wine of course) including an artistic performance and live demos. If you are in Budapest join us in person. Otherwise you can attend remotely. In either case you should register at:"
X Link 2023-11-12T17:32Z 55.3K followers, 10.5K engagements

"New Paper in Nature Human Behaviour If there is something that many democracies have in common is a great degree of polarization. But what issues divide a population And how can we detect them In [----] we ran two digital democracy experiments in France and Brazil . During their [----] presidential elections we launched platforms that allowed people to build a collaborative government program. People were asked to combine proposals drawn from the official candidates programs. In the paper we first applied traditional tools from social choice theory to identify the proposals agreed upon by the"
X Link 2023-11-16T16:17Z 55.3K followers, 56.6K engagements

"Why Venezuela wants to invade Guyana. Top exports of Guyana by year. Watch till the end"
X Link 2023-12-07T19:21Z 55.3K followers, [----] engagements

"Did you miss the CCL launch gala at Corvinus University of Budapest Here is a short video of that magical afternoon. A great team that is reaching critical mass and will continue to grow in [----]. Stay tuned for publications and job announcements"
X Link 2023-12-11T14:27Z 55.3K followers, [----] engagements

"Let me tell you an inspiring story about a different type of entrepreneurship. A venture where social and financial returns are not well aligned. This is the story of Nigist Goytom (@nigigebi) an Ethiopian entrepreneur I met in Zurich a couple of years ago. Nigist is an architect and a mother of three young children. Like many of us during the pandemic she was worried about her childrens education. So she went looking for apps to help them learn basic literacy and math skills. But while Ed Tech was booming most apps targeted the English speaking world. She wanted her children to learn the"
X Link 2024-01-16T15:12Z 56.8K followers, 10.4K engagements

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