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  • Print publication year: 2018
  • Online publication date: August 2018

6 - On the Use of Monetary and Macroprudential Policies for Small Open Economies

Summary

This paper explores optimal monetary and macroprudential policy rules for a small open economy under a sudden reversal of capital flows.1 We consider Taylor-type interest rate rules as a function of inflation, output, and credit growth; and a macroprudential instrument as a function of credit growth. We have two key results. First, in the presence of macroprudential measures, there are no significant welfare gains from monetary policy also reacting to credit growth above and beyond its response to the output gap and inflation. Moreover, monetary responses to financial market developments under both financial and real shocks generate higher welfare losses than macroprudential responses; pointing to the desirability of delegating “leaning against the wind” squarely to macroprudential policy. Second, we find that the source of borrowing is an important determinant of the desirability of alternative policies: the larger the scale of foreign currency debt, the greater the effectiveness of macroprudential instruments. Given the sizable liability dollarization in emerging economies, this finding provides one explanation why macroprudential policies featured so prominently in their response to the 2008–2009 global financial crisis, in contrast to that in advanced economies.

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