The author considers a two-stage R&D then output or price duopoly game in which R&D spills over, so reducing the marginal cost of both the investing firm and its rival. The author compares the noncooperative regime to three collusive regimes--joint venture (collusion on R&D), price fixing...

The author considers a duopoly setting consisting of two manufacturer-retailer pairs in which the observable contract between each manufacturer-retailer pair specifies a two-part tariff. Without intraband competition, the author shows that an upstream merger is anticompetitive under very general...