This paper studies the welfare consequences of a vertical merger that raises rivals costs when downstream competition …, that this result extends to price competition with differentiated products. …

in separate stages, as then firms want to limit the toll competition by setting lower capacities; or when firms set … higher capacities. In our Stackelberg competition, the firms that act last have few if any capacity decisions to influence …. Hence, they are more concerned with the toll-competition substage, and set a higher volume/capacity ratio than sociall y …