TY - JOUR AU - Ball, Laurence TI - Policy Rules for Open Economies JF - National Bureau of Economic Research Working Paper Series VL - No. 6760 PY - 1998 Y2 - October 1998 DO - 10.3386/w6760 UR - http://www.nber.org/papers/w6760 L1 - http://www.nber.org/papers/w6760.pdf N1 - Author contact info: Laurence M. Ball Department of Economics Johns Hopkins University Baltimore, MD 21218 Tel: 410/516-7605 Fax: 410/516-7600 E-Mail: lball@jhu.edu M1 - published as Laurence M. Ball. "Policy Rules for Open Economies," in John B. Taylor, editor, "Monetary Policy Rules" University of Chicago Press (1999) AB - This paper examines the choice of a monetary-policy rule in a simple macroeconomic model. In a closed economy, the optimal policy is a output and inflation. In an open economy, the optimal rule changes in two ways. First, the policy instrument is a Conditions Index the exchange rate. Second, on the right side of the rule, inflation is replaced by filters out the transitory effects of exchange-rate movements. The model also implies that pure inflation targeting is dangerous in an open economy, because it creates large fluctuations in exchange rates and output. Targeting long-run inflation avoids this problem and produces a close approximation to the optimal instrument rule. ER -