Online review aggregators, such as TripAdvisor, HotelClub and OpenTable help consumers identify the products and services that best match their preferences. The goal of this study is to understand the impact of online review aggregators on firms and consumers. We adopt Salop's circular city...

We consider a duopolistic market in which a green firm competes with a brown rival and both firms offer two vertically differentiated quality products. We study optimal non-linear contracts offered by the two firms when consumers: (i) are privately informed about their willingness to pay for...