TY - JOUR AU - Buiter,Willem H. AU - Eaton,Jonathan TI - Policy Decentralization and Exchange Rate Management in Interdependent Economies JF - National Bureau of Economic Research Working Paper Series VL - No. 531 PY - 1986 Y2 - 1986 UR - http://www.nber.org/papers/w0531 L1 - http://www.nber.org/papers/w0531.pdf N1 - Author contact info: Willem H. Buiter Citigroup Centre Canada Square, Canary Wharf London E14 5LB UNITED KINGDOM E-Mail: willembuiter@btinternet.com Jonathan Eaton Department of Economics Penn State University 608 Kern Graduate Building University Park, PA 16802-3306 Tel: (814) 865 - 8871 Fax: (814) 863 - 4775 E-Mail: jxe22@psu.edu AB - The paper provides a theoretical framework for analyzing policy formation among independent authorities operating in an interdependent environment. This is then applied to the analysis of optimal monetary policy in a stochastic two—country model with rational expectations. The main conclusions are 1) Optimal monetary policy requires a finite response of the money supply to the exchange rate (which is the only contemporaneously observed variable.) Neither a fixed nor a freely floating exchange rate is likely to be optimal. 2) Output stabilizing monetary policy may well require 'leaning with the wind' in the foreign exchange market, expanding the money supply when the home currency depreciates, thus increasing the volatility of the exchange rate. 3) The ability of the monetary authorities to influence real variables is due to the assumption that the private sector does not make exchange rate-contingent forward contracts.4) There are likely to be gains from policy coordination. ER -