We first show through a counter-example that the existence result of Maskin: Bargaining, coalitions and externalities, Presidential address of the Econometric Society, 2003] does not extend beyond three players.Intuitively, the bargaining may not be able to continue because there may be no...

The 8th problem raised by [Hart and Mas-Colell (2010) Bargaining and Cooperation in Strategic Form Games. Journal of the European Economics Association, 8(1): 7-33], is solved. To be specific, I show that the set of SP equilibria can be determined by a finite number of systems of linear...

The Hart-and-Mas-Colell bargaining model [Hart and Mas-Colell (2010). “Bargaining and Cooperation in Strategic Form Games.” Journal of the European Economics Association, 8, 7-33], which is based on strategic form games, is a very promising model possessing many beautiful features....

We introduce log-convexity for bargaining problems. With the requirement of some basic regularity conditions, log-convexity is shown to be necessary and sufficient for Nash's axioms to determine a unique single-valued bargaining solution up to choices of bargaining powers. Specifically, we show...