This paper presents one-to-one matching and assignment problems with externalities across pairs such as pairs figure skating competition and joint ventures in oligopolistic markets. In these models, players care not only about their partners but also which and how many rival pairs are formed....

This paper presents one-to-one matching and assignment problems with externalities across pairs such as pairs figure skating competition and joint ventures in oligopolistic markets. In these models, players care not only about their partners but also which and how many rival pairs are formed....

In the 1950s and 60s, Japanese and US antitrust authorities occassionally used the degree of concentration to regulate industries. Does regulating firms based on their market shares make theoretical sense? We set up a simple duopoly model with stochastic R&D activities to evaluate market share...