Before reading the piece, let me just say that I think people think they should eat more fish, but they don't like fish, so they enlarge the concept to "seafood" and eat the one thing they like that isn't as expensive as the one thing in the category that they really like (lobster).
Reading Stephen D. Levitt's analysis:
Interestingly, women in general were only half as likely to give supply explanations as were men....Oh, damn. Caught being a woman again!
Levitt thinks the answer is on the supply side:
I’m not exactly sure, but here is what I can glean from the Internet. A key factor is that prices have dropped sharply. According to this academic article, the real price of shrimp fell by about 50 percent between 1980 and 2002. When quantity rises and prices are falling, that has to mean that producers have figured out cheaper and better ways to produce shrimp. This article in Slate argues that there has been a revolution in shrimp farming. Demand factors may also be at work, but they don’t seem to be at the heart of the story.Why don't they seem to be at the heart? Because Levitt is a man?