Two partners contribute to a common project over time. The value of the project is determined by their aggregate effort and a common productivity parameter about which each partner is privately informed. At each instant, the two partners observe a noisy public signal of total effort. An...

We study chip-strategy equilibria in two-player repeated games. Intuitively, in these equilibria players exchange favors by taking individually suboptimal actions if these actions create a "gain" for the opponent larger than the player's "loss" from taking them. In exchange, the player who...

We analyze the use of information in a repeated oligopolistic insurance market. To sustain collusion, insurance companies might refrain from changing their pricing schedules even if new information about risks becomes available. We therefore provide an explanation for the existence of "unused...