The paper offers a roadmap to the current economic thinking concerning interchange fees. After describing the fundamental externalities inherent in payment systems and analysing merchant resistance to interchange fee increases and the associations' determination of this fee, it derives the...

We analyze the complex nature of interactions among participants in "two-sided" payments system markets, examine empirical evidence on benefits, especially merchant benefits, and re-assess the role of interchange in balancing interests and allocating costs between merchants and consumers. We...

In this paper, I consider eight basic fallacies that can arise from using conventional wisdom from one-sided markets in two-sided market settings. These fallacies are illustrated using statements made in the context of regulatory investigations into credit card schemes in Australia and the...

The following is a transcription of my discussion of the three papers (published in this issue) that were presented in the "Panel of Country Studies" session of the Antitrust Activity in Card-Based Payment Systems: Causes and Consequences conference.

This paper makes the case that the structure of payment systems is such that, in contrast to competition in normal markets, private incentives can encourage activities and pricing that do not necessarily improve social welfare. Furthermore, while there is usually a reasonable presumption that...

Credit cards provide benefits to consumers and merchants not provided by other payment instruments as evidenced by their explosive growth in the number and value of transactions over the last 20 years. Recently, credit card networks have come under scrutiny from regulators and antitrust...

A payment instrument that disproportionately charges merchants (as with high interchange) can take business from others that offer the two-sided customer better deals. This competitive bias arises because merchants internalize cardholders' benefits (even without merchant competition). Use of an...

This paper presents models that explain why merchants accept payment cards even when the fees they face exceed the transactional benefits they receive from a card transaction. The prevalent assumption - merchants accept cards only when they earn positive net transactional benefits - holds only...

The paper investigates, in a non-technical fashion, the economic determinants of interchange fees in payment card systems and the potential need for their regulation. Among other things, it demonstrates that the proposal for a cost-based regulation of interchange fees relies on an erroneous,...

The No Surcharge Rule (NSR) prevents merchants from charging more to consumers who pay by card versus other means ("cash"). We consider a payment network facing local monopolist merchants that serve two consumer groups, card users and cash users. Unlike in prior work, transaction quantities are...