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Determinacy and Learnability of Monetary Policy Rules in Small Open Economies

Luis-Gonzalo Llosa () and Vicente Tuesta ()

No 4479, Research Department Publications from Inter-American Development Bank, Research Department

Abstract: This paper evaluates under which conditions different Taylor-type rules lead to determinacy and expectational stability (E-stability) of rational expectations equilibrium in a simple New Keynesian small open economy model, developed by Gali and Monacelli (2005). In particular, we extend the Bullard and Mitra (2002) results of determinacy and E-stability in a closed economy to this small open economy framework. Our results highlight an important link between the Taylor principle and both determinacy and learnability of equilibrium in small open economies. More importantly, the degree of openness coupled with the nature of the policy rule adopted by the monetary authorities might change this link in important ways. A key finding is that, contrary to Bullard and Mitra, expectations-based rules that involve the CPI and/or the nominal exchange rate limit the region of E-stability and the Taylor Principle does not guarantee E-stability. We also show that some forms of managed exchange rate rules can help to alleviate problems of both indeterminacy and expectational instability, yet these rules might not be desirable since they promote greater volatility in the economy.

Date: 2006-12
New Economics Papers: this item is included in nep-cba, nep-mac, nep-mon and nep-opm
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Related works:
Working Paper: Determinacy and Learnability of Monetary Policy Rules in Small Open Economies (2011) Downloads
Journal Article: Determinacy and Learnability of Monetary Policy Rules in Small Open Economies (2008)
Journal Article: Determinacy and Learnability of Monetary Policy Rules in Small Open Economies (2008) Downloads
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