![Planet Money show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/026/080/small/npr-planet-money.jpg)
Summary: Why do businesses selling the same thing crowd around each other rather than strike out on their own? To answer that question, Adam Davidson and Chana Joffe-Walt walk through some New York City neighborhoods – the diamond district, the plant district, the chess district — where store after store sells the exact same thing.