People often think that online markets are far more efficient and competitive than traditional ones. This may not be so. In a new National Bureau of Economic Research paper, Arindrajit Dube, Jeff Jacobs, Suresh Naidu and Siddharth Suri find that a highly important online labor market is characterized by power relations so that workers lose out, and the people and organizations who hire them enjoy market power. I asked Suresh Naidu what this research means.