This paper develops microfoundations for a unified aggregate production function. Labor market frictions are naturally built into the aggregate production function because matching and production are two aspects of a single process. Entrepreneurs with heterogeneous productivity levels hire...

This paper presents a theory of how factor income shares are determined in an environment with labor market frictions and heterogeneous firms. I assume neither a specific aggregate production function nor competitive factor markets. Instead, I first develop microfoundations for an aggregate...

We examine the effects of public policy parameters in a simple directed search model of the labour market, and contrast them with those in standard random matching models with Nash bargaining. Both finite and limit versions of the directed search model are considered, and the value of the limit...

We examine the effects of public policy parameters in a simple directed search model of the labour market, and contrast them with those in standard random matching models with Nash bargaining. Both finite and limit versions of the directed search model are considered, and the value of the limit...

When is the level of entry of buyers or sellers efficient in markets with search and matching frictions? This paper generalizes the well-known Hosios condition for constrained efficiency to a wide range of dynamic search and matching environments where the expected match output depends on the...