In markets with imperfect information and heterogeneity, the information technology affects the rate at which agents meet, which in turn affects the distribution of production technologies across firms. We show that in models for such markets there are typically multiple equilibria because...

This Paper analyses the effects of macroeconomic conditions throughout life on the individual mortality rate. We estimate flexible duration models where the individual’s mortality rate depends on current conditions, conditions earlier in life (notably during childhood), calendar time, age,...

This paper considers price determination by monopolistic sellers who know the distribution of valuations among the potential buyers. We derive a novel condition under which the optimal price set by the monopolist is unique. In many settings, this condition is easy to interpret, and it is valid...

In the past decades several features of US unemployment dynamics have been investigated empirically. The original focus of research was on the duration of unemployment. In later studies the cyclicality of incidence and duration, compositional effects and duration dependence of the exit rate out...

In this Paper we simultaneously analyse transitions from unemployment to employment and to non-participation. We estimate a dependent competing risks model with non-parametric specifications of the destination-specific duration dependence and unobserved heterogeneity terms, allowing for mutual...

We combine micro and macro unemployment duration data to study the effects of the business cycle on the outflow from unemployment. We allow the cycle to affect individual exit probabilities of unemployed workers as well as the composition of the total inflow into unemployment. We estimate the...

In a large class of hazard models with proportional unobserved heterogeneity, the distribution of the heterogeneity among survivors converges to a gamma distribution. This convergence is often rapid. We derive this result as a general result for exponential mixtures and explore its implications...

Instrumental variable estimation requires untestable exclusion restrictions. With policy effects on individual outcomes, there is typically a time interval between the moment the agent realizes that he may be exposed to the policy and the actual exposure or the announcement of the actual...

This Paper surveys the existing empirical research that uses search theory to analyse empirically labour supply questions in a structural framework, using data on individual labour market transitions and durations, wages, and individual characteristics. The starting points of the literature are...

A major issue in the analysis of unemployment durations concerns distinguishing genuine duration dependence of the exit rate out of unemployment from unobserved heterogeneity. The authors present a method for the nonparametric estimation of both phenomena, designed to be applicable to...