This paper reexamines the economics of two common features of credit card networks: the interchange fee paid by merchant banks, or acquirers, to cardholder banks, or issuers; and the restraint commonly placed on merchants against surcharging for credit card transactions. We show that the...

A vertical MFN prohibits a multi-product retailer charging more for a supplier's product than for the products of rival suppliers. In the market for credit card services, this restraint takes the form of a no-surcharge rule: that a retailer not surcharge for transactions with a particular credit...