The main econometric issue in testing the Lucas hypothesis (1973) in a times series context is the estimation of the variance conditional on past information. The ARCH model, proposed by Engle (1982), is one way of specifying the conditional variance. But the assumption underlying the ARCH...

The paper offers comments on Obstfeld and Rogoff (2000). The comments primarily focus on three issues: (a) How do we reconcile the numerical examples of OR, which show quantitatively plausible resolutions to the major puzzles arising from costs of trade, with previous studies that have found...

This paper investigates the behavior of the foreign exchange risk premium in two recent two-country intertemporal-optimizing general equilibrium models with sticky nominal prices: Obstfeld-Rogoff (1998) and Devereux-Engel (1998). The foreign exchange risk premium in any general equilibrium model...

The paper explores optimizing models of small open economies that hold foreign money balances. Particular attention is paid to the impact of foreign inflation on the real exchange rate and other real variables. At first, an environment in which foreign money is the only traded asset is explored....

This paper examines optimal monetary policy in an open-economy two-country model with sticky prices. We show that currency misalignments are inefficient and lower world welfare. We find that optimal policy must target not only inflation and the output gap, but also the currency misalignment....

Firms sometimes write price lists or catalogs for their exports, so they set prices for a period of time and do not adjust prices during that interval in response to changes in their environment. The firm sets the price either in its own currency or the importer's currency. This paper draws a...

When equity prices are determined as the discounted sum of current and expected future dividends, Shiller (1981) and LeRoy and Porter (1981) derived a relationship between the variance of the price of equities, p(t), and the variance of the ex post realized discounted sum of current and future...

Nominal exchange rate changes can lead to 'expenditure switching' when they change relative international prices. A traditional argument for flexible nominal exchange rates posits that when prices are sticky in producers' currencies, nominal exchange rate movements can change relative prices...

The traditional case for flexibility in nominal exchange rates assumes that there is nominal price stickiness that prevents relative prices from adjusting in response to real shocks. When prices are sticky in producers' currencies, nominal exchange rate changes can achieve the relative price...

This paper examines optimal exchange-rate policy in two-country sticky-price general equilibrium models in which households and firms optimize over an infinite horizon in an environment of uncertainty. The models are in the vein of the new open-economy macroeconomics' as exemplified by Obstfeld...