We develop a model of price formation in a dealership market where monitoring of the information flow requires costly effort. The result is imperfect monitoring, which creates profit opportunities for speculators who pick off "stale quotes". Externalities associated with monitoring give rise to...

This paper studies how strategic interaction between players can influence their decisions as to whether to acquire information and whether to reveal their private information to others. We show how a player can increase his utility by disclosing part of his private information, when such...

We analyse the conditional versions of two closely connected mean-variance investment problems, the replication of a contingent claim on the one hand and the selection of an efficient portfolio on the other hand, in a general discrete time setting with incomplete markets. <p> We exhibit a positive...</p>