We provide a framework for analyzing the choice between optimal and robust monetary policy rules in the presence of paradigm uncertainty. We first discuss the conditions on uncertainty that render a robust rule preferable to an optimal rule. Second, we show how the degree of risk aversion of the...

We argue that in seeking to insure against model uncertainty, monetary policy makers are often ready to trade ex-post performance for greater certainty in the outcome. They thus look for rules that although not optimal ex post, have certain properties that qualify them as robust. We apply first,...

This paper analyzes the welfare implications of creating a Single Euro Payments Area. We study the effects of increased network compatibility and payment scale economies on consumer and merchant card fees and its impact on card usage. In particular, we model competition among debit cards and...

Central banks can operate with negative equity, and many have done so in history without undermining trust in fiat money. However, there are limits. How negative can central bank equity be before fiat money loses credibility? We address this question using a global games approach motivated by...