Implications of factor-based asset pricing models for estimation of expected returns and for portfolio selection are investigated. In the presence of model mispricing due to a missing risk factor, the mispricing and the residual covariance matrix are linked together. Imposing a strong form of...

We show that the when one takes into account the global equilibrium ramifications of an unwinding of the US current account deficit, currently estimated at 5.4% of GDP, the potential collapse of the dollar becomes considerably larger--more than 50% larger--than our previous estimates (Obstfeld...

We investigate the portfolio choices of mean-variance-optimizing investors who use sample evidence to update prior beliefs centered on either risk-based or characteristic-based pricing models. With dogmatic beliefs in such models and an unconstrained ratio of position size to capital, optimal...

The management of the exchange rate is possible only if the government pursues a monetary-fiscal policy mix which is consistent with its exchange rate targets. In this paper with uncertainty concerning the length of individual life the real consequences of exchange rate management depend on the...

This paper develops a dynamic framework in which macroeconomic liberalization and stabilization measures of the type recently seen in Latin America can be studied. The model is sufficiently general to cover both polar cases of a closed capital account and free private capital mobility, so the...

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...

The paper studies the effects of terms-of-trade fluctuations in an infinite-horizon optimizing model of a small open economy. While the current-account response to a transitory terms-of-trade shock is in part explicable by intertemporal smoothing, an important additional factor is the effect of...

The paper uses an intertemporal perfect-foresight optimizing model to analyze the effect of transitory terms-of-trade shocks on a small open . economy's current-account and utility time profiles. An adverse terms-of-trade shift known to be temporary induces the economy to run down its stock of...

The paper develops a model of exchange-rate and current-account determination for a small economy peopled by infinitely lived, utility-maximizing households. In this setting, a central-bank purchase of foreign exchange has no real effects when central-bank foreign reserves earn interest at the...

This paper studies the macroeconomic effects of an increase in the price of an imported intermediate production input. The framework of the analysis is a small open economy with abating exchange rate and endogenous terms if trade, in which saving depends on residents'(variable) rate of time...