Social Learning and the Gains of Experimentation: The Case of Airbnb

Reviews link the purchase decision of different consumers and create an externality. We analyze the consequences of this in a structural model of booking decisions on Airbnb.

Amazon Entry on Amazon Marketplace

We want to find out whether the concern of seller and consumer harm as a result of Amazon entry finds emprical support beyond anecdotal evidence provided by the media. To this end, we measure the predictors and effects of Amazon first-party retail entry on consumer and third-party merchant outcomes in the Home & Kitchen department of Germany’s Marketplace between 2016 and 2021. While the empirical setting presented challenges for estimating causal effects, our results are broadly inconsistent with systematic adverse effects of Amazon entry on Amazon Marketplace.