In this paper we show that existence of a Markov perfect equilibrium (MPE) in the Ericson & Pakes (1995) model of dynamic competition in an oligopolistic industry with investment, entry, and exit requires admissibility of mixed entry/exit strategies, contrary to Ericson & Pakes's (1995)...

We characterize a class of dynamic stochastic games that we call separable dynamic games with noisy transitions and establish that these widely used models are protocol invariant provided that periods are sufficiently short. Protocol invariance means that the set of Markov perfect equilibria is...

We develop a dynamic model in which firms decide when and where to enter a growing market. We do not pre-specify the order of entry, allowing instead for the roles of leader and follower to be determined endogenously. We characterize the subgame perfect equilibrium of the dynamic game and show...

Discrete-time stochastic games with a finite number of states have been widely applied to study the strategic interactions among forward-looking players in dynamic environments. These games suffer from a “curse of dimensionality” when the cost of computing players’ expectations over all...

We consider a dynamic oligopoly model in which a seller may drop out of the market when demand for its product is insufficient in the first period. Buyers suffer some disutility if a seller exits the market and so their first period purchase decision does not only depend on current period...

In this paper, we take a first step toward exploring empirically the product assortment strategies of oligopolistic firms. Our starting point is a discrete-choice demand model for differentiated products. We incorporate the demand model into an equilibrium supply model, in which firms compete by...