Gamified challenges, one of the most popular features of online weight-loss communities, enable users to set weight-loss goals and compete with other challenge participants via leaderboards. In this paper, using the data from a leading online weight-loss community, we study the effect of...

Online service marketplace consumers face more quality uncertainty due to the intangibility, variability, and unreturnable nature of the services sought, which potentially leads to the “lemons” problem (Akerlof 1970). To alleviate this problem, the platform employs refund options as quality...