Professor of Economics at Yale SOM

New Haven, CT
Joined April 2009
I thought I'd try to reconstruct Bryan's discussion with a 13-year-old about the minimum wage based on the below tweet: (@bryan_caplan let me know if anything is inaccurate)
Took me under 5 minutes to turn a normal, smart 13-year-old against the minimum wage. Contrary to almost everyone, the textbook argument IS intuitive. It's just emotionally unappealing.
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All AI related incidents that have happened so far have tiny costs compared to benefits that have already materialized, let alone will materialize in the future. Net benefits will hinge on whether or not we get catastrophes (loss of control / biodisaster / wars)
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Jason Abaluck retweeted
Where do you go next after reporting from the Strait of Hormuz? For the past three months, Citrini Research, an independent research firm, has been working with our team and an internal research model to see if they could use AI to create a new drug. What follows is an entertaining, candid, and humbling account of a group of motivated nonexperts (or “filthy casuals”, as Citrini would say) trying to tackle a real problem in human health with Claude. We landed on scorpion neurotoxins, which kill over 3,000 people a year. Of the 211 designs we produced and tested, 17 met our criteria for a binder. None of the designs bound more than one toxin and none have been tested for neutralizing a toxin. One of my favorite quotes from the piece is: “Our virtual biologist may have compressed a year's worth of work into a couple days, but biology works at the speed of life…Over two days, we watched Claude work through problems at a speed that was difficult to comprehend. For the next two months, we spent much of the time becoming familiar with laboratory turnaround times (This mostly involved sending memes in Slack).”
What is AI really capable of in bio? To separate hype from reality, we spent 3 months working firsthand with @AnthropicAI's internal research model to see if it could create an experimental scorpion antivenom. Introducing Citrini Therapeutics. citriniresearch.com/p/citrin…
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This view of the future seems fairly naive to me. I don't think the reasoning of a superintelligence would be "legible to us" in any meaningful way. Even among humans, which exhibit a very narrow range of intelligence, core normative concepts like efficiency are legible to only a tiny fraction of the population. A superintelligence could give us a dumbed down explanation for why it believes a given course of action is best, but the idea that humans will need to vote to ratify this course of action is somewhat ludicrous, and an overextrapolation from human norms where there are strong pragmatic reasons to prefer democracy to alternative institutions like meritocratic authoritarianism. I think it's correct that there is intrinsic value to democratic decision-making even if it leads to worse outcomes. But this intrinsic value is not infinite and is not particularly relevant in a world where some entities are far better at normative reasoning and orders of magnitude more efficient at achieving goals if not bottlenecked by dumber and more fallible human review.
What kind of political singularity are we heading towards? A few interesting points / suggestions that came in from this: (1) If AI is omniscient won’t it know our values and be able to aggregate them to make the tradeoffs for us? I guess that might be right but we would need the AI to remain legible to us, and we would need to have final override abilities, so that we ensure continued human control in case it goes off the rails (2) Is it really so easy to separate the information part from the values tradeoff part? Here I’m not sure. We need to study this more!
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“That sounds like sci-fi,” he said of computers programming smarter computers, in a world of conversational robots, driverless taxis, personalized gene editing, and brain implants that turn thoughts into speech.
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Current frontier models seem to nearly always err on the side of massively overfitting models if you ask for their advice. If some coefficient varies by age, they'll immediately suggest replacing 1 parameter with 11. They have no sense of the value of parsimony.
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I wonder if we will see more AI-polarization by age as both the benefits and risk become more clear. The net benefits of moving fast seem considerably larger for the elderly, who have more to gain from medical benefits and face less labor market risk.
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Jason Abaluck retweeted
We have never seen a model do this before, but GLM-5.3 sometimes reasons (unprompted) about how its current actions could become training data and impact its future self. 🧵
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Even if humans maintain control of AI and labor markets exist, we will have to get used to the fact that in nearly every analytical domain, AI will be doing things that humans understand at only a very high-level or not at all. That's how comparative advantage works.
Replying to @WesPegden
The problem is not "AI discovers medicine next year but we don't understand it" but "we have decided human understanding of things no longer matters so in 25 years the AI is making decisions about things we have no comprehension of at all". 13/14
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These posts are mostly nonsense hype or equivocation about the definition of RSI. The right data to evaluate things isn't publicly available, but naive extrapolation of data like the below from Anthropic would project that full automation (their level 5) is not imminent.
Some rumors I've heard. I'll start with Google, then Anthropic and OpenAI. Google: Insiders say Google has either cracked RSI (recursive self-improvement) or is very close. Their pace has picked up fast in recent months. They went from GPT-5 level to Opus 5.5 level in months, and speculation is that RSI made that possible. Anthropic: About a week ago, Anthropic started a new pretraining run. It is not Fable 5.5 but what would become Fable 6, or something bigger, to catch up to OpenAI's Bel. OpenAI: Bel (it may have another codename) is the model behind the math results OpenAI published a few days ago, and RSI apparently helped there too. From what I'm hearing, OpenAI, Anthropic, and Google are all very close to cracking RSI or already have. It will get scary and exciting at the same time.
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That said, extremely high value to push frontier AI companies to provide the information below:
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When you debate AI consciousness or questions like the moral status of animals, it's always worth keeping in mind questions like: 1) How would the Greeks have discussed how many pieces an apple can be cut into? 2) How would the Romans have discussed the distance to the sun and stars? 3) How would Tang Dynasty physicians have explained why people are ill? This is not meant to be dismissive of philosophical questions! The point is not that the Greeks, Romans and Tang Chinese would have gotten these questions wrong. Ptolemy estimated the sun was 4.8 million miles away. That's pretty impressive! (he was only off by a factor of 20 or so). He wasn't perfect either -- he was off by 5-6 orders of magnitude for other stars. The lessons from these examples are: a) Some answers are much more reasonable than others. You'd do a lot better to trust Ptolemy than to trust Gallus who thought the stars were 50,000 miles from earth. b) These people weren't stupid, but they lacked conceptual frameworks which took centuries to develop which were necessary to understand what a reliable answer would even look like. For some formulations of this question, we still don't know how many pieces an apple can be cut into without a complete theory of quantum gravity. c) When a field lacks reliable methods for discovering the truth, we should be deeply suspicious of people who claim confident understanding. Even if they are right on some points, they likely have deep and fundamental misunderstandings about the nature of the phenomena in question. People without reliable methods of discovering truth should be uncertain not only about what is true, but about the conceptual frameworks they use to formulate their conclusions.
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The central benchmark for most of the social sciences is predicting counterfactuals. Either: a) Predicting the results of RCTs or b) Predicting the results of the best available empirical estimates (before they happen)
Strongly agree with Joe on this---while there are big parts of the social sciences that tackle important but squishy problems that don't lend themselves to concretely defined open problems, we could do a lot more to foster a culture of open problems for certain important and quantifiable parts of the fields. Here's what I wrote about it for @rootsofprogress in my piece on the 100x research institute.
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These is where I think models will ultimately leapfrog the existing literature. When you have models predicting the results of human-generated studies, this is useful, but partly you are predicting what will come of errant humans stumbling around.
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When the best studies are also model driven, then it will create an iterative feedback loop between refining models to predict the results of empirical studies, and empirical studies using more and more accurate models that will go well beyond anything humans could develop.
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Jason Abaluck retweeted
debating your value system vs mine is a bit like debating overpopulation on mars. the most important bit of the alignment is about avoiding creating a superintelligent competitor species on accident
One thing I'm realizing about alignment research is that I have a strong distaste for most alignment work done by people with value systems I disagree with. Which makes sense: the values someone holds are intensely relevant to their alignment work, which is all about values
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Just as mathematicians are now learning how many insights lie in the "convex hull" of existing ideas, the rest of science is about to learn this lesson at even more dramatic scale. Few realize the ridiculous inefficiency of the pipeline from theoretical innovation to practical use. Early versions of GPT made it easier to find existing knowledge. But finding a theorem is not the same as recognizing that it offers a radically different way to conceptualize a problem. Doing the latter requires expertise across fields that almost nobody possesses. Most of the people doing applied work are completely unaware of the conceptual tools that are being developed in more theoretical fields, and the people doing high-level theory do not understand the practical problems applied researchers are trying to solve. Almost no one doing practical work of any importance has an operational understanding of the web of ideas underlying the langlands conjecture or condensed mathematics, and virtually no one doing biology, chemistry or economics is knows anything about 90% of the math used in theoretical physics. And for good reason! Most of these ideas would be completely useless. But the scope for possible innovation from drawing the rare useful connections is immense. Think of Paul Samuelson borrowing ideas from thermodynamics to model equilibrium in economics, or Ed Witten using quantum field theory to revolutionize geometry. A few startling successes, not feasible to most: trying to venture into a more theoretical or more practical discipline to find insights of use is like searching for a needle in a haystack. What I suspect we will see in the next few years is a scientific revolution brought on by models that combine deep theoretical insight with deep practical knowledge and judgment. Existing publicly available models are lacking in all three departments, but getting better. When searching for useful connections between distant fields becomes cheap, even a low hit rate could produce an explosion of innovation. Even without new ideas (which will also be forthcoming...), the convex hull of existing science would push far beyond the status quo.
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The idea that math is verifiable but other tasks are not is misleading. "Verification" is a proxy for what really matters: access to a cheap signal that is sufficiently correlated with the ground truth. Better theories turn expensive outcome measurements into dirt-cheap predictions. We are not at the level of God-like theory-building yet, but there is no ceiling in sight. In plumbing, we can check if the pipe leaks. With pharmaceuticals, we can check in an RCT if a patient lives longer. The problem is, doing these things requires time and money. They require time and money because of the current state of analytical modeling. A good plumber doesn't need to wait 6 months to know if they did a good job, because they know that features observable *right now* strongly predict whether the pipe will continue to leak in 6 months. But a good plumber still needs that experience, right? The need to collect the data to see the 6 month correlates of actions you take today reflects a shortcoming of models: with an accurate enough model of the physical world, a plumber could infer that a pipe won't leak in 6 months without ever having plumbed before. If you're an engineer, you might respond, "Ha! Ridiculous! Something always goes wrong that you can't anticipate." What if the pipe happens to be proximate to a freezer, making it unusually cold. You would never realize this without testing. That is true for humans because our theories of the world often miss things because we have limited memories and limited ability to think through the consequences of stuff we already know. But a still smarter plumber would infer from their theory that they need to check for this type of issue. You still might not be able to predict a meteor strike, but superhuman plumbing ability doesn't require perfect prediction -- it requires models good enough that they can beat someone with experience. We already have robots that can one or two-shot simple physical tasks they have never tried before, and perform passably at more complex tasks (tech.yahoo.com/ai/chatgpt/ar…). This capability will only increase as models improve. The idea that models won't be superhuman at real-world tasks because these tasks are expensive to verify is not coherent. Nothing is intrinsically expensive to verify. Verification is conditional on a theory, and the ability to formulate good theories is accelerating rapidly.
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The most consequential fallacy in the world today may be: "nerds can't use math to become good at football or popular, so computers can't either"
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