Unraveling the female thinness premium
That is a paper by Shasha Wang, who is on the job market from the University of Pennsylvania. Here is the abstract:
This paper studies two mechanisms that jointly contribute to thinness premium in the marriage market: the economic mechanism and the non-economic mechanism. My empirical findings from the Panel Study of Income Dynamics (PSID) reveal that all else being equal, thinner females are more likely to marry richer males. A one-unit increase in BMI (Body Mass Index), roughly equivalent to a six-pound increase for a 5’6″ figure, is associated with a 3.9% decrease in the husband’s annual labor income for noncollege wives and a 4.3% decrease for college-educated wives. Using the Simulated Method of Moments to estimate a two-stage static matching equilibrium model, this paper determines whether the observed preference for thinner female partners in the marriage market is a result of assortative mating due to the thinness premium in the labor market or is driven by non-economic factors such as a preference for smaller body sizes or other traits associated with smaller body sizes, such as self-discipline, active social interactions, and positive social image. The estimation results indicate that the positive correlation between a husband’s income and his wife’s thinness is primarily attributed to a male preference for thinner spouses. Women with a BMI below 25 only earn 4% more income than those with a BMI above 25 (assuming all other factors are equal), but having a wife with a BMI below 25 significantly enhances a husband’s utility, akin to a 1.15 times increase in his consumption.
Please note that is not her job market paper. Her main paper is a very interesting piece on when/where STEM gaps arise across men and women.
Claims about extinction and evolution
Advances in evolutionary theories (the Extended Synthesis) demonstrate that organisms systematically modify environments in ways that influence their own and other species’ evolution. This paper utilizes these theories to examine the economic consequences of human dispersal from Africa. Evidence shows that early humans’ dispersal affected the adaptability of animal species to human environments and, through this, the extinction of large mammals during Homo sapiens’ out-of-Africa migration. Empirical analyses explore the variation in extinction rates as a source of exogenous pressure for cooperation and innovation among hunter–gatherers and examine the impact of extinction on long-run development. The results indicate that extinction affects economic performance by driving continental differences in biogeography, disease environments, and institutions. Eurasia’s location along the out-of-Africa migratory path provided human and animal populations with coevolutionary foundations for domestication and agriculture, which gave Eurasians technological and institutional advantages in comparative development.
That is from a recent paper by Ideen A. Riahi, published in The Economic Journal. Via the excellent Kevin Lewis.
Returns to Education for Women in the Mid-20th Century: Evidence from Compulsory Schooling Laws
Abstract: Women had a similar level of schooling to men during the mid-twentieth century United States, but research on the returns to education for women is scarce. Using compulsory schooling laws as instrumental variables, this paper examines the causal effect of education on women’s labor market and marriage market outcomes. I examine both outcomes because women frequently traded off employment and marriage due to marriage bars and gender norms against married women working. I show that an additional year of schooling increases women’s probability of gainful employment by 7.9 pp. and women’s wage earnings by 15 percent, which can be explained by women’s entry into skilled occupations. Given the large returns on earnings, education surprisingly does not increase women’s probability of never marrying, but it does increase the probability of divorce and separation. In addition, women’s education positively affects the husband’s and the household’s labor supply and earnings, conditional on marriage formation and the husband’s education.
That is from Sophie Li, who is on the job market from Boston University. Her actual job market paper is: “The Effect of a Woman-Friendly Occupation on Employment: U.S. Postmasters Before WWII .” Some of you will wince to hear me say this, but many of the most interesting job market papers this year are on the economics of gender.
Thursday assorted links
1. “Let’s start with strawberries. I have a trio of questions on strawberries. Is it feminine to eat strawberries? Why do we eat strawberries with cream? And do you think the British consider strawberries a very British fruit and maybe the most British fruit we have?” Here is the rest of the podcast, with transcript.
2. FT interview with Claudia Sahm.
3. University of Austin now accepting undergraduate applications, with some fellowships too.
4. Dan Klein on the history of the word “liberalism.”
5. New Iceland puffin documentary (New Yorker).
China estimate of the day
According to a report by the All-China Federation of Industry and Commerce, more than 80% of China’s 1 billion private enterprises are family-owned, with about 29% of these businesses in traditional manufacturing. From 2017 to 2022, around three-quarters of China’s family businesses are in the midst of a leadership transition, marking the largest succession wave in Chinese history.
Here is the full story, via Rich Dewey.
My Conversation with the excellent Brian Koppelman
Here is the audio, video, and transcript. Here is the episode summary:
Brian Koppelman is a writer, director, and producer known for his work on films like Rounders and Solitary Man, the hit TV show Billions, and his podcast The Moment, which explores pivotal moments in creative careers.
Tyler and Brian sat down to discuss why TV wasn’t good for so long, whether he wants viewers to binge his shows, how he’d redesign movie theaters, why some smart people appreciate film and others don’t, which Spielberg movie and Murakami book is under appreciated, a surprising fact about poker, whether Jalen Brunson is overrated or underrated, Manhattan food tips, who he’d want to go on a three-day retreat with, whether movies are too long, how happy people are in show business, his unmade dream projects, the next thing he’ll learn about, and more.
Excerpt:
COWEN: Thank you. I have some very simple questions for you about the history of television to start with. I grew up in the 1970s and I’ve long wondered, “Why was TV so bad for so long before the so-called Golden Age?” Maybe you could date that to the 90s or the noughties, but why weren’t shows in the 70s and 80s better than they were? Would you challenge that premise?
KOPPELMAN: Well, I also grew up in the ’70s. I was born in ’66. I’m not sure that the hypothesis that it was bad is correct. It certainly wasn’t, in general, as an art form, operating on the level that cinema was operating on or the level that music, in part, was operating on during that time.
But if we look at, say, children’s television, I could argue that Jim Henson and Sesame Street, for what it was and aimed at what it was aimed at, was as important as any television that’s on today. I would say that Jim Henson moved the art form forward. He figured out a use case for TV that hadn’t really been done before, and he created a way of thinking about the medium that was really different.
Then, look, Hill Street Blues shows up in the ’80s and, I think, figures out how to use certain techniques of theater and cinema and novels to tell these TV stories. Like any other business, when that started to connect, then people in the business started to become aware of what was possible.
Yes, it was a function of three channels, to answer your question. Yes, in the main, of course, TV was worse. No doubt about it, but there were high points. I think those high points pointed the way toward the high points that came later. For me, NYPD Blue is the network show that’s fully on the level of any of these shows that came after. David Milch cut his teeth on Hill Street Blues.
There’s a wonderful book by Brett Martin, called Difficult Men, that’s about showrunners. It starts, in a way, with Bochco and Milch in that time period. It’s a great look into how this idea of showrunners created modern television. HBO needing something, all these business reasons underneath it, but how people who came up through, originally, Hill Street were able to go on and start this revolution.
COWEN: In your view, how good, really, was I Love Lucy? Is it just a few memorable moments, like Vitameatavegamin? Or is it actually a show where it’d be good episode after good episode, like The Sopranos?
And from Brian:
I don’t know Wes Anderson. I don’t know him, but I met him once. I love his movies, and I love that his movies are 90 minutes. The one time I met him, we were screening a film. He invited some people who happened to be in town, who he knew were film people, so I got to watch a movie with him. Afterwards, we were just talking about movies, and I said, “These movies of yours — they are 90 minutes,” and he said, “Yes. I found that the concepts I’m interested in don’t really support a journey that lasts longer than that.” He’s an incredibly disciplined filmmaker. I was like, “That makes total sense.”
Recommended, interesting and entertaining throughout.
Will we see less comovement in global economic growth?
That is the question behind my latest Bloomberg column. China is now, and looking forward, less of a common growth driver around the world. Oil price shocks may not be less important for humanitarian outcomes, but they matter less for many of the largest economies. America is now an oil exporter, and the EU just made some major adjustments in response to the Russia shock. More renewable energy is coming on-line, most of all solar.
The column closes with this:
In this new world, with these major common shocks neutered, a country’s prosperity will be more dependent on national policies than on global trends. Culture and social trust will matter more too, as will openness to innovation — and, as fertility rates remain low or decline, so will a country’s ability to handle immigration. A country that cannot repopulate itself with peaceful and productive immigrants is going to see its economy shrink in relative terms, and probably experience a lot of bumps on the way down.
At the same time, excuses for a lack of prosperity will be harder to come by. The world will not be deglobalized, but it will be somewhat de-risked.
Dare we hope that these new arrangements will produce better results than the old?
Or perhaps a more general rising tide was the only way many countries were going to make progress?
Wednesday assorted links
1. Jeff Holmes of Mercatus explains in detail “How we built econgoat.” In this case “we” means he!
2. China Foreign Direct Investment fact of the day.
3. The first full-time Taylor Swift reporter what would Adam Smith say?
4. Why protests in Panama right now?
5. Which journals are cited the most by central banks?
6. Iran is now decoupling from Hamas (FT).
Rooftops
It’s not at all clear that after tax 1% inequality has gone up at all https://t.co/rJADPjCFSg
— Adam Ozimek (@ModeledBehavior) November 8, 2023
Urban sentences to ponder
Cities in the top decile of the city-size distribution have a 50% lower markup than cities in the bottom decile.
That is from the job market paper of Santiago Franco, who is on the job market from University of Chicago with one of this year’s most interesting papers. Does that stylized fact then mean there are too many firms and outlets in the major cities, and not enough in the lesser cities?
What I’ve been reading
1. Dan Sinykin, Big Fiction: How Conglomeration Changed the Publishing Industry and American Literature. An excellent history of U.S. trade publishing, and not the sort of anti-capitalist mentality snark you might be expecting from the title. Recommended, for those who care.
2. Richard Cockett, Vienna: How the City of Ideas Created the Modern World. It’s not the same kind of deep explanation as Toulmin or Schorske, nonetheless an excellent survey and introduction to the miracles of Viennese science, philosophy, and culture, earlier in the 20th century. I enjoyed this very much.
3. Peter Kemp, Retroland: A Reader’s Guide to the Dazzling Diversity of Modern Fiction. Is this an actual book, or just some smart guy running off at the mouth and writing what he really thinks? Would I prefer the former? No!
4. Cat Bohannon, Eve: How the Female Body Drove 200 Million Years of Human Evolution. It is getting harder and harder to find good popular science books, due to exhaustion of the major topics, but this is one of them. I kept on seeing reviews of this book, and not buying it due to fears of pandering. But most of this book is genuinely illuminating and on a wide range of biological topics, most of all how the female body is different. Ovaries, menopause, differences in brains — you’ll find it all here. Furthermore, the book does not drown in political correctness. Recommended.
5. Larry Rohter,
Note also that Ethan Mollick’s Co-Intelligence is coming out in April, likely to be very good. I haven’t seen it yet.
You heard, saw, and read it here first
“Try my chat app” becomes the new “check out my podcast” https://t.co/fHHJhwuAJI
— Jeff Holmes (@Jeff_Holmes) November 7, 2023
Tuesday assorted links
1. “I find that having an additional birth causally increases desired fertility by 0.15-0.30. Further, I find the result is unlikely to be driven by experiential learning but can be explained through either a model of reference-dependent preferences or ex-post rationalization.” From Prankur Gupta, job market candidate from UT Austin.
2. Leave ChatGPT Voice on while reading a book.
3. Niall Ferguson on the economic impact of the Middle East war (Bloomberg). And on non-economic issues Yarvin.
4. Can Microsoft use tech to accelerate progress in chemistry?
5. Elites in sub-Saharan Africa are also seeing low fertility.
Autonomous Vehicles Lower Insurance Costs
The insurance giant Swiss RE did a study comparing human drivers with Waymo autonomous vehicles in the same zip-codes and found that autonomous vehicles generated significantly fewer insurance claims.
This study compares the safety of autonomous- and human drivers. It finds that the Waymo One autonomous service is significantly safer towards other road users than human drivers are, as measured via collision causation. The result is determined by comparing Waymo’s third party liability insurance claims data with mileage- and zip-code-calibrated Swiss Re (human driver) private passenger vehicle baselines. A liability claim is a request for compensation when someone is responsible for damage to property or injury to another person, typically following a collision. Liability claims reporting and their development is designed using insurance industry best practices to assess crash causation contribution and predict future crash contributions. In over 3.8 million miles driven without a human being behind the steering wheel in rider-only (RO) mode, the Waymo Driver incurred zero bodily injury claims in comparison with the human driver baseline of 1.11 claims per million miles (cpmm). The Waymo Driver also significantly reduced property damage claims to 0.78 cpmm in comparison with the human driver baseline of 3.26 cpmm. Similarly, in a more statistically robust dataset of over 35 million miles during autonomous testing operations (TO), the Waymo Driver, together with a human autonomous specialist behind the steering wheel monitoring the automation, also significantly reduced both bodily injury and property damage cpmm compared to the human driver baselines.
The Waymo vehicles are in San Francisco and Phoenix so this doesn’t mean that autonomous vehicles are better everywhere. Also, when we say autonomous vehicles we really mean the entire Waymo system including backup. In addition, there are some differences that are hard to account for such as human drivers use more freeways even in the same zip codes. Nevertheless, it is clear that autonomous vehicles are happening. I predict that some of my grandchildren will never learn to drive and their kids won’t be allowed to drive.
Sentences about Italy
More than half a century ago, an aphorism commonly attributed to the journalist Leo Longanesi captured the problem: “The revolution will never take place in Italy, because we all know each other.” The same is seemingly true for functional government.
Here is more from Mattia Ferraresi (NYT), mostly about Meloni.