Bolt and Chakravorti investigate the research on electronic payment systems. The rapid growth in the use of electronic payment instruments, especially payment cards, is a striking feature of most modern economies. Payment data indicate that strong scale economies exist for electronic payments. Payment costs will decrease through the consolidation of payment processing operations as economies of scale are realized. They come to the following conclusions: competition does not necessarily improve the balance of prices for two-sided markets and the ability of merchants to charge different prices is a powerful incentive to convince consumers to use a certain payment instrument. The effect of interventions on consumers, merchants, and banks in Australia, Spain, the European Union, and the United States are discussed. The authors also consider a few areas of payment economics that deserve greater attention.

The provision of retail payment services is complex with many participants engaging in a series of interrelated bilateral transactions and subject to large economies of scale and scope along with strong adoption, usage and network externalities. This makes sound public policy difficult. We focus on three types of market interventions for various countries. We argue that intervention into payment markets should concentrate on the removal of entry barriers in payment markets and providing greater incentives to adopt efficient payment instruments without stifling private sector investment in more efficient payment technologies over the long term. While the theoretical literature on the economics of payment cards is growing, the empirical literature is yet too limited to provide much guidance to public authorities. Eventually, the outcomes from different types of market interventions will provide a useful “natural experiment” to refute or validate the various theories of the economics of payments.

On June 21–22, 2010, the Chicago Fed and the University of Granada co-sponsored a conference that brought together policymakers, academics, and industry practitioners to discuss evolving retail payment systems and the role of public authorities, with several panels focusing on the Single Euro Payments Area.