This paper generalizes the concept of best response to coalitions of players and offers epistemic definitions of coalitional rationalizability in normal form games. The best response of a coalition is defined to be a correspondence from sets of conjectures to sets of strategies. From every best...

In a payment card association such as Visa, each time a consumer pays by card, the bank of the merchant (acquirer) pays an interchange fee (IF) to the bank of the cardholder (issuer) to carry out the transaction. This paper studies the determinants of socially and privately optimal IFs in a card...

Payment card networks, such as Visa, require merchants' banks to pay substantial "interchange" fees to cardholders' banks, on a per transaction basis. This paper shows that a network's profit-maximizing fee induces an inefficient price structure, over-subsidizing card usage and over-taxing...

In this paper, we explore the hypothesis that an important force behind the collapse in advertising revenue experienced by newspapers over the past decade is the greater consumer switching facilitated by online consumption of news. We introduce a model of the market for advertising on news media...

Bringing scholars and policymakers to the frontiers of research and addressing the critical issues of the day, the book presents original important new theoretical and empirical results. The distinguished contributors include: P. Agrel, K. Alexander, J. Crémer, X. Dassiou, G. Deltas, F. Etro,...

We provide a model of online advertising display markets where consumer attention may be divided among multiple publishers and, consequently, their advertising attention may be allocated to different platforms. We demonstrate that this gives rise to a mixture of single- and multi-homing...