Anumber of countries making the transition from centrally planned to market economies have experienced strong real exchange rate appreciations. What is causing these movements, and what steps should policymakers take in response? And with these appreciations typically entailing higher inflation, will the countries seeking to join the European Economic and Monetary Union (EMU) be able to meet the Maastricht inflation criterion? A recent paper by Mark De Broeck of the IMFs European I Department and Torsten Sløk of the Research Department finds that, in a number of countries, these appreciations are mostly driven by productivity gains. When real exchange rate appreciations are part of the process of income convergence toward the advanced economies, there is no need, they argue, for a policy response.