This paper studies optimal policy in models with multidimensional uncertainty and endogenous observables. We first consider a very general setup where the policy-maker does not observe the realisations of the shocks that hit the economy, but only some aggregate variables that are endogenous with...

We propose a model of coordination failures for business cycles in which agents learn to coordinate over time. The economy features an aggregate demand externality that leads to multiple equilibria under complete information. Under incomplete information, a group of informed agents receive...

During the period 1990-93, Finland experienced the deepest economic downturn in an industrialized country since the 1930s. We argue that the collapse of the Finnish trade with the Soviet Union in and of itself resulted in a large contraction of the economy and a costly restructuring of the...

firms consummating “sub optimal” matches.

of imports and the degree of differentiation across inputs in a sector, for which I find strong support in the data. Moreover, imperfect competition establishes a link between FDI liberalization and optimal pricing: suppliers find optimal to reduce their prices in response to the possibility of...

framework, stochastic volatility in consumption growth generates both a state-dependent market price of model uncertainty and a stochastic market price of risk. We estimate the model using data from the bond and equity markets, as well as consumption data. We show that the model is consistent...

This paper incorporates a time-varying intensity of disasters in the Rietz-Barro hypothesis that risk premia result from the possibility of rare, large disasters. During a disaster, an asset's fundamental value falls by a time-varying amount. This in turn generates time-varying risk premia and...

We present a tractable equilibrium job search model of individual worker careers allowing for human capital accumulation, employer heterogeneity and individual-level shocks. We estimate our structural model on a panel of Danish matched employer-employee data and use it to analyze the...

How does a fall in house prices a¤ect real activity? This paper presents a business cycle model in which a decline in house prices reduces geographical mobility, creating distortions in the labor market. This happens because homeowners face declines in their home equity levels, after which it...

We investigate the theoretical relationship between trade policy and growth. We use simple versions of some of the most common international trade models to investigate a number of specific mechanisms by which trade liberalization is thought to enhance growth or productivity: improvements in the...