Policy analysis in a matching model with intensive and extensive margins

"The large differences in hours of work across industrialized countries reflect large differences in both employment to population ratios and hours per worker. We imbed the canonical model of labor supply into a standard matching model to produce a model in which both the intensive and extensive margins are operative. We then assess the implications of several policies for changes along the two margins. Firing taxes and entry barriers both lead to changes in hours and employment in opposite directions, while tax and transfer policies lead to decreases in both employment and hours per worker"--National Bureau of Economic Research web site.