Put Your Money Where Your Argument Is
Walk into Bryan Caplan's corner of the internet and the first thing you notice is the scoreboard. Twenty-three bets made. Twenty-three bets won. Zero lost. He keeps a public inventory of every wager, the terms, the stakes, the date of resolution, the way a baseball statistician keeps a box score. The point is not the money - most are for a hundred dollars at even odds. The point is the principle behind his blog's name: if you really believe something, bet on it. Caplan believes a great many things most people would rather not, and he is happy to be paid for the privilege.
He is a professor of economics at George Mason University, a senior research fellow at the Mercatus Center, and an adjunct scholar at the Cato Institute. But those titles undersell the actual job, which is closer to professional heretic. Caplan takes the consensus position - on schooling, on immigration, on housing, on democracy itself - and asks, with a cheerful refusal to be embarrassed, whether the emperor is wearing anything at all.
The voter is not stupid. The voter is biased.
His breakthrough came in 2007 with The Myth of the Rational Voter, which the New York Times named the best political book of the year. The argument lands like a slap: democracies choose bad policies not because voters lack information, but because being wrong feels good and costs nothing. He calls it rational irrationality. When your single vote will not decide an election, indulging a comforting falsehood is free. So voters distrust foreigners, distrust markets, and assume the economy is always getting worse - and they vote accordingly.
It is the kind of thesis that should make a person unpopular. Caplan made it charming instead, which is the recurring trick of his career.
Schooling is a contest, not a classroom.
In 2018 he published The Case Against Education, a book whose central claim he will defend to anyone within earshot: education is mostly signaling. Roughly 80% of the personal payoff to a degree, he argues, comes not from skills you learned but from the diploma proving you are smart, conscientious, and conformist enough to finish. The classroom is less a workshop than a tournament. We are paying tuition to wave a flag.
There is a private joke folded into this public argument. Caplan homeschooled his own children, including identical twin sons, building his own curriculum while writing a book on why the official one is a waste of time and money. The man who questions the institution did not send his kids through it.
From treatise to comic book.
Then came the swerve that defines his recent decade. In 2019, Caplan teamed up with Saturday Morning Breakfast Cereal cartoonist Zach Weinersmith to publish Open Borders: The Science and Ethics of Immigration - a graphic nonfiction book making the case that opening the world's borders could roughly double global GDP and lift the poorest people on earth out of poverty. Tyler Cowen called it a landmark in economic education. It is a serious economic argument with drawings, and it works precisely because nobody expects a 200-page proof to be fun.
He ran the play again in 2024 with Build, Baby, Build: The Science and Ethics of Housing Regulation, illustrated by Ady Branzei. The pitch: free property owners to build as tall and dense as they like, and average housing prices could fall by half - while inequality drops, mobility rises, and birth rates climb. Both books are written as Socratic dialogues, with Caplan playing teacher in one panel and student in the next, arguing with himself in cartoon form.
The honesty test he built.
Among his lasting contributions is one with no equations at all. In 2011 he proposed the Ideological Turing Test: can you state your opponent's position so convincingly that their own side cannot tell you are a critic? If you cannot, Caplan suggests, you do not actually understand what you are arguing against. The phrase escaped academia and is now common currency in online debate - a rare case of an economist's idea spreading faster than his books.
That instinct - take your opponent seriously, then bet against them anyway - runs through everything. His Substack, Bet On It, takes its name from it. His essay collections, with titles like Don't Be a Feminist and How Evil Are Politicians?, lean into it. He does not soften the edges and he does not pretend the positions are popular. He simply lays out the reasoning, names a price, and waits to be proven wrong.
So far the scoreboard still reads 23 to nothing. There is something almost Wildean in the spectacle: a man who has built an entire public life out of being delightfully, profitably, unapologetically against the grain - and keeps collecting on it.