The phenomenal rise of the platform economy has reshaped how economies operate across the world. The importance of digital platforms has never been more evident than in combatting the ongoing corona virus (Covid-19) pandemic. Even with the threat of a global recession looming large, technology...

It is widely believed that vertical integration in an environment without foreclosure, or more generally without any mechanism that restricts competition among firms, raises the welfare of consumers. In this paper we show that this can be overturned in a standard setting. We consider a vertical...

We develop a product-differentiated model where the product space is a network defined as a set of varieties (nodes) linked by their degrees of substitutability (edges). We also locate consumers into this network, so that the location of each consumer (node) corresponds to her "ideal" variety....