Sunday assorted links
2. Charter city plans for Nevis? (FT)
3. Michelangelo’s foot for $27 million.
4. Philosophy intern position at Mercatus.
5. Taking governmental equity stakes in American companies.
6. The One Child Policy was not even the most important way the Chinese government discouraged births.
8. The Inkhaven Residency (for writers).
9. The political status of the Faroes (NYT).
You gotta’ believe!
AI technology can generate speculative-growth equilibria. These are rational but fragile: elevated valuations support rapid capital accumulation, yet persist only as long as beliefs remain coordinated. Because AI capital is labor-like, it expands effective labor and dampens the normal decline in the marginal product of capital as the capital stock grows. The gains from this expansion accrue disproportionately to capitalists, whose saving rate rises with wealth, raising aggregate saving. Building on Caballero et al (2006), I show that these features generate a funding feedback—rising capitalist wealth lowers the required return—that can produce multiple equilibria. With intermediate adjustment costs, elevated valuations are the mechanism that sustains a transition toward a high-capital equilibrium; a loss of confidence can precipitate a self-fulfilling crash and reversal.
That is from a new NBER working paper by Ricardo J. Caballero.
*The School of Night*
That is the new Knausgaard book, excellent and moving. Better than any Knausgaard work other than the first two volumes of My Struggle. The ending is especially good and meaningful, revising much of what came before. You can buy it here.
A new hypothesis (from my email)
From Anonymous:
Hello Professor Cowen,
I hope all is well with you and that you have navigated the recent weather alright.
I have a thought that I wanted to run by you that related to phones and teen anxiety.
You have cited a variety of studies that say that phones and social media do not cause anxiety. As you may recall, I have taught junior high and high school for almost 30 years. I did see a big spike in anxiety for my students, especially females, around the years 2010-2017/18ish. I used to think “phones,” but now I’m not sure. The anxiety spike has declined. My last ‘anxious’ class of seniors are now seniors in college. Students today are on the phones as much as those in the past.
Here is my theory: Students started to feel more anxious around 2010 because they could sense the coming seismic cultural and political shifts coming, of which phones were a harbinger or carrier. They were mostly not conscious of this, and couldn’t express it, but they were trying to cope.
Now, they have coped. My current seniors have unusual political ideas but are mostly optimistic. I contrast them to a centrist friend of mine who does some DC work and constantly thinks the sky is falling.
Now, adults are more anxious, not students. Adults are starting to see these seismic shifts and they are trying to cope. Perhaps they are projecting their own anxiety onto their kids, and are behind the times with the cause. Phones may have helped drive anxiety 10 years ago, but maybe not anymore. Students have coped and adjusted to a new equilibrium.
It is also possible that phones serve as a good/useful “myth” (I mean this in a positive sense) for the shifts we are seeing and the anxiety many feel . We need something tangible to hold our thoughts on the shifts in culture, and we have chosen phones. Thus, the clash over phones today might be between those who think in mythic/symbolic ways, and those who think in more scientific ways. Both are right in their own perspective. The new cultural and political shifts over the last 10-15 years would naturally bring on anxiety. Phones are not the cause of the shift, but a good symbol of it.
Sebastian Galiani on the Marginal Revolution
The most successful economics blog in the world is called Marginal Revolution.
That is not an accident….Consider a few common mistakes that reappear whenever marginal thinking is abandoned:
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- Treating the owner’s biography—wealth, identity, status—as if it entered the firm’s marginal conditions. It does not.
- Confusing redistribution with allocation. Redistribution is a legitimate political choice, but it should not be smuggled into production decisions where it distorts incentives and blocks reallocation.
- Ignoring opportunity cost. Resources used to sustain one activity are resources not used elsewhere. The relevant question is always: what is the next best alternative?
- Believing that efficiency is static. In reality, efficiency is dynamic, and depends precisely on the ability of resources to move when margins change.
One of the most uncomfortable implications of marginal analysis is that reallocation is essential. Labor and capital must sometimes leave declining uses so they can enter expanding ones. That process is rarely smooth, and never painless. But blocking it does not make an economy more humane; it makes it poorer.
The twentieth century gave this insight a name. Joseph Schumpeter called it creative destruction. János Kornai warned that when losses are systematically covered—when budget constraints are soft—adjustment never happens, inefficiency becomes chronic, and stagnation follows.
Marginal analysis explains why. If losses have no consequences, margins lose meaning. Prices stop signaling scarcity. Productivity differences stop guiding allocation. The economy becomes a museum of preserved structures rather than a system that adapts.
Excellent throughout, here is the link.
Saturday assorted links
1. Indeed the Turner watercolor went for 165k, well above the estimate. The Hubert Robert for 53k.
2. Reason and Rationality program for middle school students. High school program here.
3. In defense of hallucinations? Note that Princeton Law Review does not exist.
4. Economics of a Super Bowl ad.
5. Searchable database of every book mentioned on Conversations with Tyler.
6. Prophets of the Leopold Aschenbrenner.
7. David Pilling reviews Joe Studwell’s new Africa book (FT).
8. Are there just as many female autistics?
9. Brazil is still in better fiscal shape than is Argentina.
FT podcast with Soumaya Keynes
Mostly about the economics of food, this is from their episode summary:
If you want to understand food – and eat better – economics is a good place to start. How do immigration patterns shape a country’s cuisine? How do labour laws make our working lunches worse? And why do strip malls serve such good grub?
About 33 minutes, here are the links:
Spotify: https://open.spotify.com/episode/30oLOLQZvGmvxJzA31X3qK
Can government coerce women into having more babies?
To illustrate this challenge of measurement and inference, Figure 7 presents Romanian birth rates before, during, and after the imposition of an infamously coercive policy aimed at raising births. In 1966, a dictatorial government imposed Decree 770, which banned abortion and made modern contraception effectively inaccessible. The figure extends an idea from Sobotka, Matysiak, and Brzozowska (2019), which compares cohort and period fertility rates in Romania over a similar evaluation window. We add data from Bulgaria, Romania’s neighbor that was also communist during the time of the policy and that might plausibly serve as a control, shedding light on what course Romanian fertility might have followed after 1967 if not for the policy. Panel A plots period birth rates in the two countries and shows that Romania and Bulgaria had substantially similar trends and levels in period total fertility rates before and after the Romanian policy window. Focusing on panel A of Figure 7, it is clear that birth rates in Romania changed dramatically following the start of the policy, as families were taken by surprise. TFR nearly doubled in the year that followed. The sharp timing of this apparent impact following the policy change, together with the availability of data from neighboring Bulgaria to serve as a control, suggests the possibility of a difference-in-differences analysis comparing birth rates pre– and post–Decree 770 in Romania and Bulgaria.
But while such an analysis could answer the narrow question of the causal effect of Decree 770 on the total fertility rate in 1967, it may nonetheless reveal little in terms of the impact of the policy on the number of children Romanian women had over their lifetimes. After the initial rise in TFR, birth rates soon began falling quickly in Romania, as behavior adapted to the new policy regime. If, for example, an unexpected pregnancy results in a birth at a young age in 1968, a woman may choose and succeed at reducing the probability of a pregnancy in subsequent years, and still achieve the same lifetime count of children.
For a discussion of the theoretically ambiguous impact of abortion restrictions on birth rates, see Lawson and Spears (2025). Of course, the extent of persistence from period fertility to completed fertility depends on the details: A shock that encourages earlier-than-desired births, as Romania’s might have, allows for adjustment later in life. But it may be harder, later in life, to adjust for a policy or event shock that leads to fewer births early in life.Panel B of Figure 7 plots completed cohort fertility. As in earlier figures, cohorts are plotted along the horizontal axis according to the year in which they turned 30. Although Romanian completed cohort fertility began at a higher level than in Bulgaria over the available data series, completed cohort fertility in Romania did not maintain a sizable upward trend relative Bulgaria during the period that Decree 770 was in force.
That is from the recent Geruso and Spears JEP survey piece on whether we can expect fertility rates to rebound in the future. By the way, after Hungary’s subsidy-driven baby boom, the country is now having a baby bust, it is possible that similar mechanisms are operating.
The economics of the NBA trading deadline (from my email)
From an anonymous correspondent:
Perhaps, as NBA fan, there’s a column to be written about the incentives that drove the NBA trade market: namely the all-out search to avoid/get out of the luxury tax and the looming “tank” battle among the 6 worst teams. These are both direct results of the recent NBA collective bargaining agreement changes. Of course, as these attempts to regulate behavior go, the ‘benign’ intentions of the regulators are far different from the actions of the rational actors having to live within the system.
The funniest behavior-following-incentive example was orchestrated by the Minnesota Timberwolves. In step-by-step:
–They traded Mike Conley Jr. + a 1st round pick to the Bulls for “cash”.
–Why would they do this? For two reasons: one above board, one below board.
–Above board: the trade freed up cap room to trade for another Bulls guard, in a separate trade (Ayo Dosunmo). They could not have done that trade, according to cap rules, with Conley on board.
Now the below board, cap and rule circumvention steps:
–The Bulls then re-traded Conley to the Hornets as a ‘throw-in’ portion of a larger trade.
–The Hornets then waived Conley
–Why these moves? Because now Minnesota can re-sign Conley after he was waived. They would not have been allowed to re-sign him if the Bulls cut him. (You can’t re-sign a player you traded…unless that player is re-traded).
There will, of course, be no evidence that Minnesota set this whole process up during the step 1 portion. But, human intuition would say: of course this was all part of Minnesota’s original plan.
And then economically: I challenge any business, anywhere, to have executed a better cost-savings strategy than the Boston Celtics did this year. They left last off-season with a looming $540mm salary + luxury tax bill for this 2025-26 season. Through a series of trades, they have cut that down to $190mm – and have fully avoided the luxury tax. Most amazingly: they are a better team today than they were at end of last year. That is $350mm in savings in one year, with a quality improvement to boot! Unheard of efficiency.
Sadly: the worst part of the NBA overregulation world will now commence. 6-8 teams will spend the rest of the year trying to lose every game. Losing profits in this world, through the ‘logic’ of the NBA draft lottery.
At any rate, a fun day for any NBA fan – but especially for the economically-minded. Incentives matter!
TC again: I would not have expected the major trade stories to involve the Washington Wizards…
How much is childlessness the fertility problem?
The average decline in fertility among these recent cohorts relative to the cohorts preceding them by 20 years was 0.25 births. Of this decline, 0.09 births, or 37 percent of the gap, is statistically accounted for by increased childlessness in the later cohort. The remaining 0.16 births, or 63 percent of the gap, is accounted for by declines in fertility among the parous.
A similar analysis can be used to decompose differences across districts in India, where the difference to be decomposed is across districts for women born in the same set of years, with two groups of districts defined by having the lowest and highest cohort fertility rates. Unsurprisingly, given panel B of Figure 5, almost all of this difference—94 percent—is accounted for by the difference in fertility among the parous. Differing patterns of childlessness account for only 6 percent of the gap between high-fertility and low-fertility districts.
That is from a new and useful JEP survey article by Michael Geruso and Dean Spears. The main concern of the authors is whether we can ever expect a fertility rebound.
Friday assorted links
1. A good tweet about art collections.
2. Banknote bouquets could land you in jail, Kenya’s central bank warns.
3. Cass Sunstein on the aesthetics of liberalism. And Becca Rothfeld on similar issues.
4. How will low fertility rates affect economies? One estimate given has U.S. per capita consumption falling by over eight percent, which I consider “large,” though it seems the author (David N. Weil) does not?
5. Survey on the economics of noncompete clauses.
6. Is Bluey the most conservative show on TV? (WSJ)
7. Someone likes the new Wuthering Heights movie.
8. Covid has now become what some people claimed it was all along.
The polity that is Bolivia?
Bolivia’s new president is planning major reforms to unleash a mining and oil exploration boom, burying nearly 20 years of socialism in the Andean nation with a new policy — “capitalism for all”.
Rodrigo Paz, a pragmatic centrist former senator, said his team was working on a package of laws to boost foreign investment in natural resources that would be presented to congress for approval “in the coming days or months”.
“We need a new oil and gas law,” Paz told the Financial Times in an interview while attending an economic forum in Panama.
“Bolivia should go for 50-50 [risk-sharing with foreign investors]. I give you the space. You come in with technology and investment . . . I think it’s the basis for business in future.”
Bolivia has a fifth of the world’s reserves of lithium, according to the US Geological Survey, but with its state-owned company YLB lacking technical expertise and investment, it has struggled for years to produce commercial quantities of the battery metal and exports are currently dominated by neighbouring Chile.
Bolivia also has big reserves of silver, tin and antimony. Paz said the Bolivian people, who have a history of protesting against mining, would support fresh investment if they were shown they would benefit financially. He compared his country to its neighbours: “Peru last year had mining revenues of around $50bn. Chile had revenues with state and private companies of $65bn. And we . . . had just $6bn,” he said.
Here is more from Michael Stott at the FT. We will see, as they say. I am cautiously hopeful.
Poverty and Dependency in the United States, 1939–2023
We compare trends in absolute poverty before (1939–1963) and after (1963–2023) the War on Poverty was declared. Our primary methodological contribution is to create a post-tax post-transfer income measure using the 1940, 1950 and 1960 Decennial Censuses through imputations of taxes and transfers as well as certain forms of market income including perquisites (Collins and Wanamaker 2022), consistent with the full income measures developed by Burkhauser et al. (2024) for subsequent years. From 1939–1963, poverty fell by 29 percentage points, with even larger declines for Black people and all children. While absolute poverty continued to fall following the War on Poverty’s declaration, the pace was no faster, even when evaluating the trends relative to a consistent initial poverty rate. Furthermore, the pre-1964 decline in poverty among working age adults and children was achieved almost completely through increases in market income, during which time only 2–3 percent of working age adults were dependent on the government for at least half of their income, compared to dependency rates of 7–15 percent from 1972–2023. In contrast to progress on absolute poverty, reductions in relative poverty were more modest from 1939–1963 and even less so since then.
That is from a new NBER working paper by Richard K. Burkhauser and Kevin Corinth.
Argentina dollar facts of the day
From greenbacks stuffed into children’s teddy bears to fortunes tucked away in the ceiling, Argentines have more than $250 billion in dollars stashed at home, along with offshore accounts and safe-deposit boxes—some six times the reserves of the central bank.
But two years into Milei’s government, Argentines are easing their grip on their precious dollars.
Dollars held in the country’s banks by private-sector investors hit a record at the end of last year of nearly $37 billion, up 160% since Milei took office in December 2023, according to central-bank data.
Here is more from the WSJ.
Hanno Lustig and Romain Wacziarg now have a Substack
Self-recommending, here goes.
Transcript: What an economist eats for lunch (in 2026), with Tyler Cowen—FT
via FT’s The Economics Show with Soumaya Keynes episode page Rules for dining from the world’s foremost foodie economist.