Harvesting Ratings

The authors thank Yair Antler, Paul Belleflamme, Maren Hahnen, Paul Heidhues, Botond Kőszegi, Xavier Lambin, François Maniquet, Simon Martin, Martin Peitz, Andrew Rhodes, Robert Somogyi, Clément Staner, Nikhil Vellodi, Julian Wright, and many seminar participants for helpful comments. This paper was previously titled “Ratings and Reciprocity.”