 Do you remember when you first read David Card's Mariel Boatlift paper? Wow, that paper is iconic. Clemens says that before this paper about the Mariel Boatlift, people assumed that the laws of supply and demand applied to immigrants. But Clemens says it doesn't always work that way. He asked me to think of bananas. If there's a marketplace and bananas are $3 a bunch and you flood that market with bananas,