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Home bias, exchange rate disconnect, and optimal exchange rate policy

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Jian Wang

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Abstract

This paper examines how much the central bank should adjust the interest rate in response to real exchange rate fluctuations. The paper first demonstrates in a two-country Dynamic Stochastic General Equilibrium (DSGE) model, that the home bias in consumption is important to duplicate the exchange rate volatility and exchange rate disconnect documented in the data. When home bias is high, the shock to Uncovered Interest-rate Parity (UIP) can substantially drive up exchange rate volatility while leaving the volatility of real macroeconomic variables, such as GDP, almost untouched. The model predicts the volatility of the real exchange rate relative to that of GDP increases with the extent of home bias. This relation is strongly supported by the data. Then a second-order accurate solution method is employed to solve the model and compare the conditional welfare under different policy regimes. The results suggest that the monetary authority should not seek to vigorously stabilize exchange rate fluctuations. In particular, when the central bank does not take a strong stance against the inflation rate, exchange rate stabilization may induce substantial welfare loss. The model also suggests no welfare gain from the international monetary cooperation, which extends Obstfeld and Rogoff's (2002) findings to a DSGE model.

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Paper provided by Federal Reserve Bank of Dallas in its series Working Papers with number 0701.

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Date of creation: 2007
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Handle: RePEc:fip:feddwp:0701

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  1. Charles Engel & Jian Wang, 2008. "International Trade in Durable Goods: Understanding Volatility, Cyclicality, and Elasticities," NBER Working Papers 13814, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
  2. Campbell Leith & Simon Wren-Lewis, 2007. "The Optimal Monetary Policy Response to Exchange Rate Misalignments," Economics Series Working Papers 305, University of Oxford, Department of Economics. [Downloadable!]
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  3. Charles Engel & Jian Wang, 2007. "International trade in durable goods: understanding volatility, cyclicality, and elastics," Globalization and Monetary Policy Institute Working Paper 03, Federal Reserve Bank of Dallas. [Downloadable!]
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