Real world players often increase their payoÞs by voluntarily committing to play a .xed strategy, prior to the start of a strategic game. In fact, the players may further bene.t from commitments that are conditional on the commitments of others. This paper proposes a model of conditional...

Many important economic situations can be modelled as dynamic games of incomplete information with strategic complementarities of actions and types. Of special interest is the question of the existence of a perfect Bayesian equilibrium in which actions are monotonic in types. In this paper, we...