In this paper, we study how the presence of a news aggregator affects competition among (horizontally differentiated) newspapers in the Internet. For this purpose, we build a model of multiple issues which allows each newspaper to choose quality on each issue. Our model provides a micro...

We study competition among upstream firms when each of them sells aportfolio of distinct products and the downstream has a limited numberof slots (or shelf space). In this situation, we study how bundlinga¤ects competition for slots. When the downstream has k number ofslots, social e¢ ciency...