In October 2011, new rules governing debit card interchange fees became effective in the United States. These rules limit the maximum permissible interchange fee that an issuer can charge merchants for a debit card transaction. This paper provides simple calculations that identify the...

This paper reviews recent developments in online and mobile banking in the United States that provide bank account holders with low-cost interfaces to manage account-to-account electronic money transfers. The paper analyzes the emerging decentralized market in which A2A money transfers are...

This paper investigates how buyers allocate their spending among debit, credit, and prepaid cards. Using the 2012 Diary of Consumer Payment Choice, I show that consumers tend to concentrate the majority of their transactions and a large value of their transactions on a single type of card. The...