U.S. real exchange rate fluctuations and relative price fluctuations

Traditional theory attributes fluctuations in real exchange rates to changes in the relative price of nontraded goods. This paper studies the relation between the United States’ bilateral real exchange rate and the associated bilateral relative price of nontraded goods for five of its most important trade relationships. We find that this relation depends crucially on the choice of price series used to measure relative prices and on the choice of trade partner. The relation is stronger when we measure relative prices using producer prices rather than consumer prices. The relation is stronger the more important is the trade relationship between the United States and a trade partner. Even in cases where there is a strong relation between the real exchange rate and the relative price of nontraded goods, however, a large fraction of real exchange rate fluctuations is due to deviations from the law of one price for traded goods.     

Endogenous tradability and some macroeconomic implications

While nontraded goods play an important role in many open economy macroeconomic models, these models have difficulty explaining the low volatility in the relative price of nontraded goods. In contrast to macroeconomic convention, this paper argues that the share of nontraded goods is endogenous, a time-varying product of macroeconomic shocks and trade costs that are heterogeneous across goods. A simple open economy model demonstrates that trade cost heterogeneity and a time-varying margin of tradedness dramatically reduces the volatility of nontraded prices. This also reduces the ability of real exchange rate adjustments to dampen current account imbalances.     

Convergence,capital accumulation and the nominal exchange rate

This paper develops a flexible price, two-sector growth model with a nominal side to study the role of the exchange rate in transition dynamics. We adopt a standard small open economy model with traded and nontraded goods, where the engines of growth are exogenous productivity improvements and capital accumulation. We enhance this standard framework by adding a preference for real money holdings, captured by money-in-the-utility. We follow Schmitt-Grohé and Uribe (2003) and assume that the interest rate on bonds issued by the small open economy is debt-dependent, and interpret it as a simple financial friction. We show analytically that the choice of the exchange rate regime influences the transition dynamics of a small open economy through the balance sheet of the central bank. We then calibrate the model to explore the quantitative significance of our results. We find that the choice of the exchange rate regime has significant and lasting effects on prices, consumption, investment and sectoral allocations, and the composition of financial assets.     

Nontraded goods, market segmentation, and exchange rates

Empirical evidence suggests that movements in international relative prices are large and persistent. Nontraded goods, both in the form of final consumption goods and as an input into the production of final tradable goods, are an important aspect driving international relative price movements. In this paper we show that nontraded goods play an important role in the context of an otherwise standard open-economy macromodel. Our quantitative study with nontraded goods generates implications along several dimensions that are more closely in line with the data relative to the model that abstracts from nontraded goods.     

Real exchange rates under alternative nominal exchange-rate systems

The paper develops an equilibrium model of the determination of exchange rates, the relative price of nontraded goods, and the current account. The focus is on the effects of various real and nominal disturbances and the conditions under which the nominal exchange-rate system is neutral with respect to real variables in the economy. The model demonstrates an assymetry in the roles of trade and nontraded goods in affecting exchange rates. An econometric investigation of the raltion between the exchange-rate system and the variability of real exchange rates provides some evidence against the neutrality hypothesis.     

Expenditure switching versus real exchange rate stabilization: Competing objectives for exchange rate policy

This paper develops a view of exchange rate policy as a trade-off between the desire to smooth fluctuations in real exchange rates so as to reduce distortions in consumption allocations, and the need to allow flexibility in the nominal exchange rate so as to facilitate terms of trade adjustment. We show that optimal nominal exchange rate volatility will reflect these competing objectives. The key determinants of how much the exchange rate should respond to shocks will depend on the extent and source of price stickiness, the elasticity of substitution between home and foreign goods, and the amount of home bias in production. Quantitatively, we find the optimal exchange rate volatility should be significantly less than would be inferred based solely on terms of trade considerations. Moreover, we find that the relationship between price stickiness and optimal exchange rate volatility may be non-monotonic.     

Modeling exchange rate passthrough after large devaluations

Large devaluations are generally associated with large declines in real exchange rates. We develop a model which embodies two complementary forces that account for the large declines in the real exchange rate that occur in the aftermath of large devaluations. The first force is sticky nontradable-goods prices. The second force is the impact of real shocks that often accompany large devaluations. We argue that sticky nontradable goods prices generally play an important role in explaining post-devaluation movements in real exchange rates. However, real shocks can sometimes be primary drivers of real exchange-rate movements.     

Nominal exchange rate volatility,relative price volatility,and the real exchange rate

We model real exchange rate, nominal exchange rate, and relative price volatility using real and nominal factors. We analyze these volatility measures across developing and industrialized countries. We find that the inclusion of nominal factors achieves a sizable reduction in the real exchange rate volatility spread between developing and industrialized countries. In addition, we find that nominal factors matter to real exchange rate volatility in the short run and the long run, and that for developing countries, a higher share of real exchange rate volatility stems from relative price volatility.     

Real exchange rate persistence and monetary policy rules

The objective of this paper is to analyze the effects of alternative monetary rules on real exchange rate persistence. Using a two-country stochastic dynamic general equilibrium with nominal price stickiness and local currency pricing, we will show how the persistence of purchasing power parity deviations can be related to a monetary theory of these deviations. When monetary policy lean against the wind, there is no relationship of proportionality between the time during which prices remain sticky and the persistence of the response of the real exchange rate: in this case high nominal price rigidity is not sufficient, per se, in generating any persistence following a monetary shock. Moreover, we emphasize the role of interest rates smoothing policies and relative price stickiness within countries in understanding the relationship between the real exchange rate and monetary shocks. With reasonable parameters values, a wide range of monetary policy rules can generate real exchange rate autocorrelations around the ones observed in the data.     

Accounting for real exchange rates using micro-data

The classical dichotomy predicts that all of the time-series variance in the aggregate real exchange rate is accounted for by non-traded goods in the consumer price index (CPI) basket because traded goods obey the Law of One Price. In stark contrast, Engel (1999) claimed the opposite: that traded goods accounted for all of the variance. Using micro-data and recognizing that final good prices include both the cost of the goods themselves and local, non-traded inputs into retail such as labor and retail space, our work re-establishes the conceptual value of the classical dichotomy. We also carefully show the role of aggregation, consumption expenditure weighting and assignment of covariance terms in the differences between our findings and those of Engel.     

An examination of the effects of government purchases in an open economy

This paper examines the effects of permanent and transitory changes in government purchases in the context of a model of a small open economy that produces and consumes both traded and nontraded goods. The model incorporates an equilibrium interpretation of the business cycle that emphasizes the responsiveness of agents to intertemporal relative price changes. It is demonstrated that transitory increases in government purchases lead to an appreciation of the real exchange rate and an ambiguous change (although a likely worsening) in the current account, while permanent increases have an ambiguous impact on the real exchange rate and no effect on the current account. When agents do not know whether a given increase in government purchases is permanent or transitory the effect is a weighted average of these separate effects. The weights depend on the relative variances of the transitory and permanent components of government purchases.     

Revisiting the consumption-real exchange rate anomaly in a model with non-traded goods

This paper shows that the assumption used in many two-country business cycle models that all non-traded goods are nondurable consumption goods magnifies the severity of the consumption-real exchange rate anomaly, which is the discrepancy between the high correlation between relative consumption and the real exchange rate predicted by most models and the low correlation observed empirically. This assumption hampers the ability to generate wealth effects necessary for the economies to deviate away from full risk-sharing. Using an alternative setup in which non-traded goods can also be investment goods improves the ability of the model to generate wealth effects, and therefore to overcome the anomaly.     

Estimating exchange rate responsiveness to shocks

The goal of this paper is to examine the importance of permanent and transitory shocks using a more efficient trend-cycle decomposition of the real exchange rate series. Our main contribution is that in measuring the impact of shocks, we not only impose common trend restrictions but also common cycle restrictions. We later confirm, through a post sample forecasting exercise, the efficiency gains from imposing common cycle restrictions. Our results indicate that permanent shocks are responsible for the bulk of the real exchange rate variations for Japan, Italy, Germany, France, and the UK vis-à-vis the US dollar over short horizons. For Canada, however, transitory shocks are dominant over the short horizon. In sum, while for Japan, France, and Italy, around 15% of the variation in real exchange rate is due to transitory shocks, for Canada, Germany and the UK, over 25% of the variations over the short horizon are due to transitory shocks. Thus, we claim that the role of transitory shocks should not be ignored.     

A fundamental theory of exchange rates and direct currency trades

In this paper we construct a two-country search model to determine the nominal exchange rate between two fiat monies. Our model allows agents to use any currency to trade for goods in all countries. However, search frictions restrict agents’ opportunities for instantaneous arbitrage, and hence make the nominal exchange rate determinate. The nominal exchange rate depends on the two countries’ economic fundamentals, including the stocks and growth rates of the two monies. Direct exchanges between currencies are essential and they imply a nominal exchange rate that is different from the relative price between the two currencies in the goods markets. There are persistent violations of the law of one price and purchasing power parity in equilibrium, despite the fact that prices are perfectly flexible and all goods are tradeable between countries. Nominal and real exchange rates can move together in the steady state in response to money growth shocks.     

The behaviour of the real exchange rate: Evidence from regression quantiles

We test for mean reversion in real exchange rates using a recently developed unit root test for non-normal processes based on quantile autoregression inference in semi-parametric and non-parametric settings. The quantile regression approach allows us to directly capture the impact of different magnitudes of shocks that hit the real exchange rate, conditional on its past history, and can detect asymmetric, dynamic adjustment of the real exchange rate towards its long run equilibrium. It, therefore provides a detailed mapping of the real exchange rate behaviour, while being a robust alternative to previous unit root tests. The latter is confirmed by a simulation analysis comparing the power of the alternative tests. As concerns the real exchange rate, our results suggest that large shocks tend to induce strong mean reverting tendencies in the exchange rate, with half lives less than one year in the extreme quantiles. Mean reversion is faster when large shocks originate at points of large real exchange rate deviations from the long run equilibrium. However, in the absence of shocks no mean reversion is observed. Finally, we report asymmetries in the dynamic adjustment of the RER.     

Devaluation, Fiscal Deficits, and the Real Exchange Rate

This article examines the use of fiscal policies to sustainthe effects of a nominal devaluation on the real exchange rate.It is shown that the magnitude of the change in the real exchangerate depends not only on the size of the devaluation and thedegree of fiscal adjustment but also on the means by which thefiscal deficit is reduced. The change in the nominal exchangerate necessary to maintain the depreciation of the real exchangerate will depend on whether the fiscal deficit is eliminatedby increasing taxes or by reducing government expenditures ontraded and nontraded goods. The required depreciation of thedomestic currency will be larger if the fiscal deficit is reducedby increasing taxes than it will be if the deficit is cut bylowering government expenditures. Further, the depreciationwould be smaller if the cuts in expenditure fell on traded ratherthan nontraded goods. This result implies that the authoritiesmust ensure consistency between exchange rate action and policiesto reduce fiscal imbalances in order to achieve a desired levelof the real exchange rate necessary to attain balance of paymentsequilibrium.     

A Short History of Price Level Convergence in Europe

We study the evolution of price level dispersion in Europe by combining time-series information on harmonized indices of consumer prices (HICPs) with occasional observations of absolute price levels. We find that European price levels converged over much of the last 40 to 50 years. In the United States, our benchmark, price level dispersion is more or less stable. A back-of-the-envelope calculation suggests that indirect tax rate harmonization, convergence of nontraded input costs, and convergence of traded input costs (in the form of exchange rate stability and increased openness) are all important in explaining European price level convergence.     

Price,output, and exchange rate movements in the open economy

Since the advent of managed floating it has come to be accepted as a stylized fact that short-run deviations from purchasing power parity are both substantial and persistent. Two explanations of these deviations have been advanced in the literature. One emphasizes the role of changes in non-traded goods prices while the other views deviations from purchasing power parity as being due to sticky goods prices and slow adjustment of goods markets. This paper presents yet a third possible explanation of deviations from purchasing power parity — they may be necessary in order to facilitate the relative price changes that are required to maintain equilibrium in the face of unanticipated shocks. In addition, the issue of exchange rate overshooting is addressed. Whereas the sticky price models view exchange rate overshooting and exchange rate volatility as symptoms of some fundamental disequilibrium, the perspective taken here is that these events are, in principle, compatible with a world in which all markets clear continuously.     

Productivity shocks and real exchange rates

Previous studies have concluded that productivity shocks have negligible effects on real exchange rate fluctuations. This paper shows that when long-run equilibrium relationships between real exchange rate levels and fundamental variables are taken into account, relative productivity shocks account for most of the long-run movements in the real exchange rates. This can be interpreted as empirical support for the Balassa (1964. Journal of Political Economy 72, 584-596) and Samuelson (1964. Review of Economics and Statistics 46, 145-154) model where differences in relative productivity is the main source of long-run deviations for purchasing power parity.     

Trade concentration, openness, and deviations from purchasing power parity

Economists have often explained deviations from PPP in terms of random relative price changes. While all countries are subject to such real shock, empirical studies indicate that PPP seems to hold closer for some countries than others. This paper emphasizes two major reasons why we should expect systematic differences across countries in deviations from PPP: (a) the concentration of trade and (b) openness. The more diversified trade, the less susceptible the country to random shocks affecting individual goods, so that shifts in the PPP ratio are lower. The more open the economy, the greater the weight of traded goods in the overall price indices, so that if exchange rates are determined by traded goods prices, yet empirical tests of PPP use national price indices, PPP should hold better in more open economies.