Interest Rate Targeting In A Small Open Economy

An important hurdle in analyzing interest rate targeting is that standard models usually lead to price level or inflation rate indeterminacy. This paper develops a simple framework in which such problems do not arise because the bonds whose interest rate is controlled provide liquidity services. This framework is used to examine interest rate targeting in a small open economy under predetermined exchange rates. A permanent increase in the interest rate has no real effects. In contrast, a temporary increase in the interest rate leads to higher consumption and to a current account deficit that worsens over time.

Seminar paper from the year 2008 in the subject Business economics - Economic Policy, grade: 1,3, University of Bonn (Wirtschaftspolitische Abteilung der Rechts- und Staatswissenschaftlichen Fakultät), course: Geldtheorie- und politik, language: English, abstract: Does inflation reduce welfare? What is worse, a volatile exchange rate or a high inflation rate? And is the central bank able to drive these variables? These questions are the topic of a paper by Jordi Gali and Tommaso Monacelli, published in 2005 and titled “Monetary Policy and Exchange Rate Volatility in a Small Open Economy”. As apparent by the title Gali and Monacelli (G+M) analyze the influence of monetary policy on the volatility of the exchange rate, more precisely the nominal exchange rate and the terms of trade. For this purpose they create a small open economy with sticky prices of Calvo-type. Due to its minor size this economy does not influence the world economy. However, depending on the degree of openness this economy is affected by the rest of the world. Having specified this framework, G+M introduce three different monetary regimes and evaluate the resulting exchange rate volatilities . Using a central bank loss function G+M rank these three rules according to the implied welfare which shows a positive correlation between welfare and exchange rate volatility. Thence G+M prefer Taylor rules over an exchange rate pegging. To get a general idea of Gali and Monacelli`s argumentation this expose will start in chapter 2 with an abbreviated overlook over G+M’s model of a small open economy. In the following chapter there will be the introduction of the three central bank rules, necessary to close the model, as well as an analysis of the underlying welfare levels. Since the welfare evaluation is based on some special assumptions, chapter 4 will give an overview of recent literature which discusses possible extensions as well as their implications for G+M’s ranking of implied welfare. Concluding chapter 5 will summarize G+M’s most important results as well as evaluate if the possible extensions render G+M’s analysis, respectively their results, worthless.

Introducing habit formation into an open economy macroeconomic model with price stickiness, we examine the characteristics of an optimal monetary policy. We find that, first, the optimal policy rule entails interest rate smoothing and responds to the lagged values of the foreign interest rate and domestic technology shocks as well as their current values. Second, habit formation enriches the dynamics of the economy with a persistent, hump-shaped response of consumption to shocks. Finally, when habit formation does matter, the optimal policy rule achieves a greater welfare improvement over alternative policy rules by achieving lower macroeconomic variability.

An important hurdle in analyzing interest rate targeting is that standard models usually lead to price level or inflation rate indeterminacy. This paper develops a simple framework in which such problems do not arise because the bonds whose interest rate is controlled provide liquidity services. This framework is used to examine interest rate targeting in a small open economy under predetermined exchange rates. A permanent increase in the interest rate has no real effects. In contrast, a temporary increase in the interest rate leads to higher consumption and to a current account deficit that worsens over time.

This paper develops a new macrofinance model for small open economies, allowing the investigation of Mauritius's experience with 'inflation targeting lite' as described in Stone (2003). It finds that this monetary policy regime has been associated with a general reduction in inflation, principally through a reduction in inflation expectations. The credibility the Bank of Mauritius has established with its 'inflation targeting lite' regime has allowed it to shift from an emphasis on exchange rate targeting towards inflation targeting. By estimating a model in which the yield curve is modeled explicitly we are able to obtain estimates of inflation expectations.

We present an extensive analysis of the consequences for global equilibrium determinacy in flexible-price open economies of implementing active interest rate rules, i.e., monetary rules where the nominal interest rate responds more than proportionally to inflation. We show that conditions under which these rules generate aggregate instability by inducing liquidity traps, endogenous cycles, and chaotic dynamics depend on specific characteristics of open economies. In particular, rules that respond to expected future inflation are more prone to induce endogenous cyclical and chaotic dynamics the more open the economy to trade.

We lay out a small open economy version of the Calvo sticky price model, and show how the equilibrium dynamics can be reduced to a tractable canonical system in domestic inflation and the output gap. We employ this framework to analyze the macroeconomic implications of three alternative monetary policy regimes for the small open economy: domestic inflation targeting, CPI targeting and an exchange rate peg. We show that a key difference among these regimes lies in the relative amount of exchange rate volatility that they entail. We also discuss a special case for which domestic inflation targeting constitutes the optimal policy, and where a simple second order approximation to the utility of the representative consumer can be derived and used to evaluate the welfare losses associated with suboptimal regimes.

This paper studies optimal monetary policy in a two-sector small open economy model under segmented asset markets and sticky prices. We solve the Ramsey problem under full commitment, and characterize the optimal monetary policy in a calibrated version of the model. The findings of the paper are threefold. First, the Ramsey solution mimics the allocations under flexible prices. Second, under the optimal policy the volatility of non-tradable inflation is close to zero. Third, stabilizing nontradable inflation is optimal regardless of the financial structure of the small open economy. Even for a moderate degree of price stickiness, implementing a monetary policy that mitigates asset market segmentation is highly distortionary. This last result suggests that policymakers should resort to other policy instruments in order to correct financial imperfections.

We develop a optimal rules-based interpretation of the 'three pillars macroeconomic policy framework': a combination of a freely floating exchange rate, an explicit target for inflation, and a mechanism than ensures a stable government debt-GDP ratio around a specified long run. We show how such monetary-fiscal rules need to be adjusted to accommodate specific features of emerging market economies. The model takes the form of two-blocs, a DSGE emerging small open economy interacting with the rest of the world and features, in particular, financial frictions It is calibrated using Chile and US data. Alongside the optimal Ramsey policy benchmark, we model the three pillars as simple monetary and fiscal rules including and both domestic and CPI inflation targeting interest rate rules alongside a 'Structural Surplus Fiscal Rule' as followed recently in Chile. A comparison with a fixed exchange rate regime is made. We find that domestic inflation targeting is superior to partially or implicitly (through a CPI inflation target) or fully attempting to stabilizing the exchange rate. Financial frictions require fiscal policy to play a bigger role and lead to an increase in the costs associated with simple rules as opposed to the fully optimal policy.