We use a field experiment to investigate the effect of incentives on food purchase decisions at a grocery store. We recruit over 200 participants and track their purchases for a period of 6 months, permitting us a glimpse of more than 3,500 individual shopping trips. We randomize participants to...

Research on shelf effects in traditional grocery stores has shown that a product's absolute and relative shelf position may strongly affect consumer choices. In this paper, we examine whether and how such shelf effects translate into an online grocery context. We find that a product's choice...