See 'On-The-Job Search, Mismatch and Efficiency', forthcoming in the 'Review of Economic Studies'.

This paper characterizes the equilibrium for a large class of search models with two-sided heterogeneity and on-the-job search. Besides the well-known congestion externalities, we show that on-the-job search in combination with monopsonistic wage setting without commitment creates a...

We study both the various consequences and the incentives of outsourcing. We argue thatthe wage elasticity of labour demand is increasing as a function of the share of outsourcing,which is importantly a result consistent with existing empirical research...

In labor markets with worker and firm heterogeneity, the matching between firms and workersmay be assortative, meaning that the most productive workers and firms team up. Weinvestigate this with longitudinal population-wide matched employer-employee data fromPortugal...

This discussion paper resulted in a publication in <A href="http://www.sciencedirect.com/science/article/pii/S0927537110000916">'Labour Economics'</A>, 17(6), 875-85.<P>Labor market theories allowing for search frictions make marked predictions on the effect of the degree of frictions on wages. Often, the effect is predicted to be negative. Despite the popularity of these...</p></a>

Labor market theories allowing for search frictions make marked predictions on the effect of the degree of frictions on wages. Often, the effect is predicted to be negative. Despite the popularity of these theories, this has never been tested. We perform tests with matched worker-firm data. The...