Joined August 2019
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José Moran retweeted
This piece from @psantacl explains the error in the degrowth agenda furthered by @PikettyWIL @stiglitzian and others who signed the @guardian article theguardian.com/commentisfre… @JonSteinsson @albertobisin It is well worth reading. If you teach undergraduates: make sure they read @psantacl’s arguments. The level of hubris demonstrated by the signers of the Guardian piece is extraordinary.
"The pie is fixed. The Earth is a closed system. You cannot have infinite growth on a finite planet." I hear this constantly, and it's delivered like a law of physics — case closed, only a compromised economist could disagree. It's wrong. And the mistake is revealing, because it isn't in the physics. It's in the economics smuggled inside the physics.
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José Moran retweeted
"The pie is fixed. The Earth is a closed system. You cannot have infinite growth on a finite planet." I hear this constantly, and it's delivered like a law of physics — case closed, only a compromised economist could disagree. It's wrong. And the mistake is revealing, because it isn't in the physics. It's in the economics smuggled inside the physics.
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José Moran retweeted
The same people preaching sovereignty and dunking on Mistral today will come crawling back to Fable the moment Anthropic switches it on again
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José Moran retweeted
How often do you think about the Roman empire?
The European mind cannot comprehend this
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José Moran retweeted
L’esthétique contemporaine, épurée, sans fioritures, fonctionnelle et efficace, qu’on retrouve dans la déco, l’ameublement, l'urbanisme, les objets, les logos des marques... me rappelle ce qu’écrit le philosophe sud-coréen Byung-Chul Han dans Sauvons le beau 👇
"Le problème avec le relativisme, c'est que s'il y a autant de beautés que d'individus, il n'y a plus de beauté" BRUT. PHILO — Il est souvent considéré comme élitiste, mais si le luxe pouvait être ouvert à tous ? C'est l'idée que défend la philosophe @CareniniE autrice d'un essai intitulé "Une autre histoire du luxe". Elle en parle ici avec @aymericgoetschy et évoque la beauté qui peut avoir tendance à être aujourd'hui moins présente dans l'espace public...
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José Moran retweeted
La Maison-Blanche vient de forcer Anthropic à couper ses modèles avancés à tous les étrangers—qu’il soient ou non sur le sol américain. Les effets géopolitiques de cette décision historique sont massifs. Analyse à chaud @victorstorchan, très conseillée. legrandcontinent.eu/fr/2026/…
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I've been doing modelling through computer simulations for about 10y now, starting in computational physics and now doing it in economics (what people call ABMs). One constant there is that making modular models is a *pain*, in physics it basically means writing a dynamic algo
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similar sets of columns are archetypes and are stored efficiently in memory. Want to extend your simulation? Just add new columns and new functions. Add strongly typed languages and you have something cool going on
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Anyway, they wrote a cool substack about it that you can check out mcrcsm.substack.com/p/ecs-th… And you can also look into libraries like bevy. It's also used in unity. It's very fun to use!

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José Moran retweeted
What would it require to enforce Piketty’s plan? About this matter, he is conveniently vague. Confiscating something on the order of 10% of world GDP and redirecting it through a newly created supranational body does not happen by asking nicely. You cannot restructure the global economy at that scale without a coercive apparatus that dwarfs anything in human history. The mechanism must be authoritarian. It would require a world government with the power to tell billions of people which jobs they may and may not hold, what they may build, what they may eat and how many hours they are permitted to work. And to what end? “Climate change” is an insufficient answer when Picketty’s entire edifice is built on a discredited foundation. The report relies on a baseline from the RCP8.5 climate scenario that projects Earth warming by as much as 4.8 degrees Celsius by 2100. But last month, the UN’s own climate panel officially retired RCP8.5 (always a high-end estimate) as “implausible.” A more central projection is about 2.7 C. Replies to Piketty’s X feed pointed this out immediately. His response, as far as anyone can tell, has been silence. That leaves the inequality argument. Worldwide income inequality is nearing a 150-year low, but Piketty insists that radical redistribution of wealth is essential for the Global South. And where have billionaires and wealth been popping up fastest in recent decades? Embarrassingly, data from Piketty’s World Inequality Database confirms that it’s in South and Southeast Asia, as well as East Asia. These are the exact Global South regions that have spent recent decades rescuing hundreds of millions of people from poverty through market-directed economic growth. latimes.com/opinion/story/20…
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José Moran retweeted
I see we're in day 7 of the 'we're scientific economists, the other are lefty cranks' discourse of the status-quo evangelists.
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José Moran retweeted
Important context to the AI accusation flying around on here about the recent Guardian growth op-ed. Thanks, @sc_cath. It's always easy to pile on, but more important to get the facts, especially when accusing someone of academic impropriety. "Would I still make this accusation if I agreed with their viewpoint?" is a good test.
The French version published in Le Monde passed the test. Maybe it was written in French and translated using AI. I also think the wording of the French version is somewhat less crazy. For example, the first sentence says that “we live in an era of artificial scarcity” while the version published in the Guardian says it’s “manufactured.” Manufactured sounds much more deliberate/intentional.
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Of course this may read slightly ad-hominem but I roughly agree. It is somewhat easy to argue for limiting growth in eg France when you're already massively well off, and likely also a homeowner who doesn't have to worry about the lack of housing stock in Paris
Replying to @PikettyWIL
Thank you for answering questions Mr Piketty. I also have one. Like you, I also don’t want to live in a world where some are vastly richer than others and thereby have vast control over others. I’m with you on that. But I’m wondering how you are thinking about yourself in relation to your proposal. Given your work, I’d imagine you earn perhaps 500,000? Or given just how large your sales figures are, probably more? How do you square this with your proposal? Will you stop working as much so your salary goes down to 60,000? Or are you perhaps already giving away almost all your income?
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which is, again, why these proposals are usually mocked as coming from out of touch individuals from the global "Brahmin left" to use pikettist terminology. Why is it when I go home to latin america I hear nothing about limiting growth? (Of course the authors argue people in
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latam should actually be happy of getting money through redistribution, but diplomatic relations with the northerly neighbour should make you think of how realistic that is vs the usual historic growth that leaks unto latam)
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José Moran retweeted
Replying to @PikettyWIL
Thank you for answering questions Mr Piketty. I also have one. Like you, I also don’t want to live in a world where some are vastly richer than others and thereby have vast control over others. I’m with you on that. But I’m wondering how you are thinking about yourself in relation to your proposal. Given your work, I’d imagine you earn perhaps 500,000? Or given just how large your sales figures are, probably more? How do you square this with your proposal? Will you stop working as much so your salary goes down to 60,000? Or are you perhaps already giving away almost all your income?
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Btw I do think that there is a point that if one were to take a lot of the models that couple climate and the economy and were to translate them into *plain English* (eg not an obfuscated language accessible only to magic number priests) then it would be very clear how crazy they
One magic number priest argues that two other magic number priests are wrong, but that the third is certainly right! A holy war of models so to speak. We are back in 1500
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open debates about macro. The issue is that the Piketty et al piece is also guilty of this: the climate projections they use are based on climate/macro models that are built using a lot of things that are objectionable, but that are not easily accessible to the general public.
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And if you think this resembles a theological debate, well, you are partly right because even though climate models are empirically tested (against past and current data) models that do climate/macro simply are not, so it does have some resemblance to byzantine debates
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