As well as theoretical evidence advocating the intertemporal view, the authors present four case studies in support of this approach: Germany before and after unification, Spain before joining the EMS, the United States since the early 1980s, and Japan’s persistent current account surpluses.

Rochet and Tirole have derived an elasticity rule for relative prices in two-sided markets. This rule is seen as counterintuitive because it seems to imply that the "more elastic side of the market" is charged more. In this note it is argued that this interpretation is based on the assumption...

Abstract Card payment systems are sometimes accused of taking from the poor and giving to the rich. The argument is as follows: High card fees are leading to higher retail prices for both, card users and cash users. However, high-income card holders are receiving rewards when purchasing by card....