RYAN AVENT is an economics correspondent for the Economist. He's also the primary contributor to its Free Exchange blog and a contributor to The New York Times, The Washington Post, The New Republic, The Atlantic, and The Guardian, among other publications. He is the author of a Kindle Single: The Gated City, which analyzes migration from American cities. Avent was previously an economic consultant and an industry analyst for the Bureau of Labor Statistics. He lives in London, England.