International Finance

This essay written for The New Palgrave dictionary of Ecnomics provides a selective and interpretive account of the development of thought on international financial questions. Attention is focused on the process of international adjustment and on the proper definition of external balance. Since the first descriptions of the price-specie-flow mechanism in Humes time, the definition of external balance has evolved in response to changes in the world economy's structure. The foreign reserve constraint so central under the gold standard or in the early Bretton Woods years is less important under conditions of high international capital mobility. Increasingly, the current account and the national intertemporal budget constraint are emphasized in discussions of international adjustment. In analogy with the idea of a high-employment government budget surplus, a working definition of external balance might be a current account that maintains the highest possible steady consumption level consistent with the economy's expected intertemporal budget constraint. Intertemporal approaches to external balance become more difficult to apply when countries face credit rationing as a result of nonrepayment risk.

Exchange Rates and Adjustment: Perspectives from the New Open Economy Macroeconomics

The New Open Economy Macroeconomics has allowed economists to tackle classical problems with new tools, while also generating new ideas and questions. In their attempts to make the new models capture empirical regularities, researchers have entertained a variety of assumptions about the international pricing of goods, notably, models of pricing to market and destination-currency pricing of exports. Some of the resulting models imply that exchange-rate changes lack international expenditure-switching effects, and they thus appear to call for a radical rethinking of the role of exchange rates in international adjustment. This paper argues that the recent resurgence of exchange-rate pessimism stems from oversimplified modeling strategies rather than from evidence. Like earlier episodes starting with the extreme 'elasticity pessimism' of the early postwar era, it is based on a misinterpretation of the empirical record.

Inflation, Real Interest, and the Determinacy of Equilibrium in an Optimizing Framework

This paper examines the short-run relation between anticipated inflation and the real rate of interest in a model where agents with perfect foresight maximize utility over infinite lifetimes. In addition to deriving behavioral functions from explicit intertemporal optimization, the approach taken here departs from the usual IS-LM analysis in that it is dynamic and deals with a small economy open to trade in consumption goods. Because capital mobility must be ruled out to allow scope for variation in the real interest rate, the results obtained here for one of the two exchange- rate regimes considered -- free floating -- apply equally to a closed economy. The paper shows that an increase in the expected inflation rate depresses the real interest rate in the short run when the exchange rate is instantaneously fixed by the central bank. When equilibrium is determinate in the floating-rate case, the real interest rate is invariant with respect to inflation.

How Integrated are World Capital Markets? Some New Tests

This paper present some new empirical evidence on the extent of world capital-market integration. The first set of tests carried out uses data from different countries to compare internationally expected marginal rates of substitution between consumption on different dates. If residents of different countries have access to a nominally risk-free bond denominated in dollars, say, their common expected marginal rate of substitution of future for present dollars should equal the gross nominal return on dollar bonds. Tests of the international equality of expected marginal substitution rates yield evidence consistent with a substantial degree of international capital-market integration after, but not before, 1973. These tests are naturally based on a particular model of intertemporal consumption choice, but direct estimation of the inter-country relationships implied by that model lends support to its assumptions. These last findings are relevant to the current debate in macroeconomics about the role of intertemporal substitution. The second set of tests conducted in this paper concerns correlations between countries' saving and investment rates. For a sample often countries, correlations between annual changes in saving and investment rates over the period 1948-1984 look quite similar to those found in quarterly data. Surprisingly, however, the correlation coefficients are often lower before the mid-1960s than afterward This finding throws further doubt on the interpretation of saving-investment correlation coefficients as structural parameters reflecting the response of domestic investment to shifts in national saving.

Can We Sterilize? Theory and Evidence

This paper is a highly selective review of our knowledge about the scope for sterilized intervention in foreign exchange markets under alternative exchange-rate regimes. Section I demonstrates the potential importance of simultaneous-equations bias in single-equation econometric studies of the capital-account offset to monetary policy under fixed exchange rates. The empirical record suggests that, in the case of West Germany, sterilization was a feasible short-run monetary strategy in the 1960s. Section II notes that there is considerable recent evidence of imperfect asset substitutability under the managed float. While limited substitution between bonds of different currency denomination is a precondition for the efficacy of sterilized foreign-exchange intervention, it is no guarantee of efficacy. Whether limited substitutability can in fact be exploited in a predictable manner by central banks is a distinct, and unanswered, question.

Implications for the Yen of Japanese Current Account Adjustment

This paper presents a quantitative evaluation of the effect on the yen of some alternative scenarios under which Japan reaches current account balance. The analytical framework is a global general equilibrium model, based closely on Obstfeld and Rogoff (2005a, b), within which relative prices clear the world markets for traded goods as well as the domestic markets for nontraded goods. Depending on assumptions about the critical substitution elasticities underlying the model, the yen could appreciate by as much as 10 percent for each 1 percent of GDP reduction in its current account surplus. The effect would be smaller if substitution elasticities were larger, or if adjustment were accompanied by an expansion of Japanese nontradable output, the latter presumably implied by a return to a more efficient level of labor utilization.Current account adjustment; International capital flows; Japanese yen exchange rate

Pricing-to-Market, the Interest-Rate Rule, and the Exchange Rate

Even when the exchange-rate plays no expenditure-switching role, countries may wish to have flexible exchange rates in order to free the domestic interest rate as a stabilization tool. In a setting with nontraded goods, exchange-rate movements may also enhance international risk sharing.

Balance-of-Payments Crises and Devaluation

The collapse of a fixed exchange rate is typically marked by a sudden balance-of-payments crisis in which"speculators" fleeing from the domestic currency acquire a large portion of the central bank's foreign exchange holdings.Faced with such an attack, the central bank often withdraws temporarily from the foreign exchange market, allowing the exchange rate to float freely before devaluing and returning to a fixed-rate regime. This paper links the timing of the initial speculative attack to the magnitude of the expected devaluation and to the length of the transitional period off loating. An implication of the analysis is that there exist devaluations so sharp and transition periods so short that acrisis must occur the moment the market first learns that the current exchange parity will eventually be altered. For sufficiently long transition periods, the floating exchange rate"overshoots" its new peg before appreciating back toward it;for shorter periods, the rate depreciates monotonically to its new fixed level. Accordingly, the central bank's return tothe foreign exchange market can occasion a capital outflow or a capital inflow.

Peso Problems, Bubbles, and Risk in the Empirical Assessment of Exchange-Rate Behavior

One of the most puzzling aspects of the post-1973 floating exchange rate system has been the apparently inefficient predictive performance of forward exchange rates. This paper explores some aspects of each of three leading explanations of forward-rate behavior. The paper first develops a simple rational-expectations model of the "peso problem" that generates some key empirical regularities of the foreign exchange market: seemingly predictable and conditionally heteroskedastic forward forecast errors, along with possible directional misprediction by the forward premium. The implications of bubbles for tests of forward-rate predictive efficiency are discussed next. It is argued that the existence of bubbles is extremely difficult (if not impossible) to establish empirically. Even though some types of bubble would distort standard tests on the relation between spot and forward exchange rates, it seems unlikely that there bubbles have been an important factor. Finally, the paper examines foreign-exchange asset pricing under risk aversion and suggests that a convincing account of forward-rate behavior should also help explain the results found in testing other asset-pricing theories, such as the expectations theory of the interest-rate term structure.

Rational and Self-Fulfilling Balance-of-Payments Crises

The recent balance-of-payments literature shows that-speculative attacks on a pegged exchange rate must sometimes-occur if the path of the rate is riot to offer abnormal profit opportunities. Such attacks are fully rational, as they reflect the market's response to a regime breakdown that is inevitable.This paper shows that, given certain expectations about policy, balance-of-payments crises can also be purely self-fulfilling events. In such cases even a permanently viable regime maybreak down, and the economy will possess multiple equilibria corresponding to different subjective assessments of the probability of collapse. The behavior of domestic interest rates and foreign reserves will naturally reflect the possibility of a speculative attack. Work on foreign-exchange crises derives from the natural-resource literature initiated by Salant and Henderson (1978),where the definition of "abnormal" profit opportunities is straightforward. Because the definition is not always straight-forward in a monetary context, this paper also shows how crises occur in a discrete-time stochastic monetary model when an eventual breakdown is inevitable.