We analyze the competitive effects of backward vertical integration by a partially vertically integrated firm that competes with non-integrated firms both upstream and downstream. We show that vertical integration is procompetitive under fairly general conditions. It can be anticompetitive only...

We investigate the possibility for two vertically related firms to at least partially collude on the wholesale price over an in.nite horizon to mitigate or eliminate the e¤ects of double marginalisation, thereby avoiding contracts which might not be enforceable. We characterise alternative...

Computerbesitzer kombinieren Komplementärguter zu einem Computersystem. Mit dem Computersystem möchten sie Daten mit anderen Nachfragern und zwischen verschiedenen Applikationen austauschen. Aus diesen Interdependenzen ergeben sich drei verschiedene Netzwerkeffekte, die im Rahmen eines...