Payments are increasingly being made with payment cards despite the fact that the cost of clearing a card payment usually exceeds the cost of transferring cash. We examine this puzzle through the lens of monetary theory. We consider the design of an optimal card-based payment system when cash is...

A controversial aspect of payment cards has been the no-surcharge rule. This rule, which is part of the contract between the card provider and a merchant, states that the merchant cannot charge a customer who pays by card more than a customer who pays by cash. In this paper we consider the...

The quintessential crime of the information age is identity theft, the malicious use of personal identifying data. In this paper, the authors present a model of identities and their use in credit transactions. The incidence of identity theft represents a tradeoff between a desire to avoid costly...

The consequences of a straightforward monetary targeting scheme are examined for a simple dynamic macro model. The notion of “targeting” used is the strategic one introduced by Rogoff (1985). Numerical calculations are used to demonstrate that for the model under consideration, monetary...