JF

Jesus Fernandez-Villaverde

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Jesus Fernandez-Villaverde has been a guest on EconTalk .

Recently: “The Great Fertility Collapse (with Jesus Fernandez-Villaverde)” on EconTalk (October 2026).

What They Said

“Why is Italy's soccer team so bad lately? Well, because there are just so much fewer Italians. So, if you are trying to select the best 22 soccer players when you have 300,000 Italians being born every year, you are going to have a much worse team than when you used to have 1 million Italians being born every year.” — Jesus Fernandez-Villaverde, EconTalk

Russ Roberts raised Julian Simon's argument that people are the ultimate resource. Fernandez-Villaverde offers the example he uses with undergraduates: shrinking birth cohorts mean fewer top scientists, artists and athletes in the right tail.

EconTalk · 2026-10-12 Permalink → Listen →
EconTalk Around 1:05:25 into the episode
Jesus Fernandez-Villaverde

…but there is also a political economic scenario where it's actually not that great for the environment. And I have always been a big believer that the best policy to protect the environment is economic growth. Because when people get rich, they care a lot about how pretty your garden is. Yeah.

Russ Roberts

…innovation and creativity will be less, presumably, in a smaller world, unless we get along better in a smaller world, which would maybe make it easier to sit around and write symphonies. I don't know. We got AI coming. Who knows? But talk a little bit about, if you want to, about that phenomenon.

Jesus Fernandez-Villaverde

Yeah. Basically, the idea is: you know, how many Einsteins are you going to have in a population? Well, to some degree, it depends on how many children you have. And when you have a much smaller population, you are going to have a lower chance of having a top person. So, for the undergrads, I use a slightly more mundane example, which is why is Italy's soccer team so bad lately? Well, because there are just so much fewer Italians. So, if you are trying to select the best 22 soccer players when you have 300,000 Italians being born every year, you are going to have a much worse team than when you used to have 1 million Italians being born every year. So, your soccer team is just going to be much worse on average. Well, substitute soccer players for top scientists, top artists, top creative people in any dimension that you want to have. Now, you're absolutely right that we can try to move the needle in other aspects. For instance, I'm a big lover of classical music, and one of the things that surprises me the most is the incredible amount of…

Russ Roberts

And the last thing we'll close with this is that you talk in the paper about in markets, there are feedback loops that offset changes. And you suggest that there aren't so many obvious ones for population. I think there are. I think the cultural changes of modernity are going to be challenged when…

Jesus Fernandez-Villaverde

That may be true. I mean, let me give you a concrete example. In the Commonwealth of Pennsylvania, where I live, it's already very difficult to win a statewide election if the Amish do not support you. Because the Amish has been growing so much that now they are a pivotal voting block. At the…

Russ Roberts

My guest today has been Jesus Fernandez-Villaverde Villa Verde. Jesus, thanks for being part of Econ Talk.

Speaker names from our own diarization · position estimated from where the line sits in the episode
“If as a society your default is two, you are going to end up with 1.4. Why? Because you are going to have a percentage of women that, for whatever the reason, don't have children, maybe biological or maybe by choice. And you are going to have also a non-trivial percentage of women that are going to stay at one. And you are going to have next to nobody with three or more.” — Jesus Fernandez-Villaverde, EconTalk

On EconTalk, Fernandez-Villaverde explains why a country where most families have two children still ends up far below replacement fertility. He argues that getting back to replacement takes many families with three children, and that modern society has made a third child very hard.

EconTalk · 2026-10-12 Permalink → Listen →
EconTalk Around 37:14 into the episode
Jesus Fernandez-Villaverde

…with more than two children. It's really very difficult to have three children. It really conflicts with your work, with your professional career. Housing is very expensive, and with three children, you need a bigger house. So, most families are opting for two. Now, you're saying, well, that have

Russ Roberts

children. Most families that have children. That's

Jesus Fernandez-Villaverde

exactly what I'm going. That's exactly what I'm going. And what we try to argue in the paper is: if as a society your default is two, you are going to end up with 1.4. Why? Because you are going to have a percentage of women that, for whatever the reason, don't have children, maybe biological or maybe by choice. And you are going to have also a non-trivial percentage of women that are going to stay at one. And you are going to have next to nobody with three or more. So, if as a society your default is two, you end up with 1.4. And that's something that I really think most people have not internalized. So, when we are talking about countries like the United Kingdom at 1.4, you will go to a park and you will see children playing. Most children will be playing with a sibling. It's not that they are long, it's not like the one child in China. And yet, with two…

Russ Roberts

Well, fortunately, I'm an economist because if I weren't, I might be tempted to say, well, you're obviously wrong because we have four kids, but we are the exception. And obviously, we're very aware that that's an unusually large family when we lived in the United States. Here in Israel, it's not…

Jesus Fernandez-Villaverde

2.5, 2.6. Okay,

Russ Roberts

so above replacement rate, their poor population growing steadily, as we know, many more people in the United States today than there were in 1950. Something changed. We don't know what that is. You point to in the paper, by the way, and it's a very readable paper for non, the things you want to…

Speaker names from our own diarization · position estimated from where the line sits in the episode

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