Can increasing returns to scale in search explain regional differentiation between cities and rural areas? To answer this question, we develop a model of an economy that consists of several regions. Within each region, jobs and workers are heterogeneous by respectively skill and job complexity...

We study the implementation of constrained-efficient allocations in labour markets where a basic coordination problem leads to an equilibrium matching friction. We argue that these allocations can be achieved in a non-cooperative equilibrium if wages are determined by ex post bidding. This holds...

Frequently, new technologies arise under two or more alternative designs. Moreover, the state of each design evolves over time as a result of various cumulative improvements. In this paper, we study the strategic interaction between \incumbentquot; firms (those who already own a design) and...

This paper estimates a structural model of demand for the personal computer (PC) by repeat purchasers. Taking advantage of a large dataset on household-level PC purchases, the econometric model uses variation in PC holdings among PC owners to identify households' marginal values of quality...