Urbanization economies - the effects on productivity and utility created endogenously by larger cities - are a fundamental component of both the economic geography of modern societies and the perpetuation of innovation and economic growth at a national level. Cities account for vast majorities...

Urbanization economies - the effects on productivity and utility created endogenously by larger cities - are a fundamental component of both the economic geography of modern societies and the perpetuation of innovation and economic growth at a national level. Cities account for vast majorities...

Responding to a paper in this journal by Evans, we assess the relative role of equilibrium and disequilibrium in modeling regional growth and decline. While there are elements of both present, we find a preponderance of evidence that equilibrium forces are the dominant influence

Urbanization economies - the effects on productivity and utility created endogenously by larger cities - are a fundamental component of both the economic geography of modern societies and the perpetuation of innovation and economic growth at a national level. Cities account for vast majorities...

We study the indeterminacy of equilibrium in the Fujita-Krugman model of city formation under monopolistic competition and increasing returns. Both the number and the locations of cities are endogenously determined. Assuming smooth transportation costs, we examine equilibria in city-economies...

We consider a model of monopolistic competition with several heterogeneous sectors and endogenous labor supply. For low (high) values of the labor supply elasticity, we show that there is always a unique equilibrium. For medium values of the labor supply elasticity, the set of equilibria (if...

We establish an existence theorem for the Cournot-Walras equilibria in the model which consists of a representative consumer and n-monopolistically competitive firms. Instead of the traditional approach which depends on Kakutani’s fixed point theorem, we employ the theory of the relationship...

"We consider Roy's economies with perfectly competitive labor markets and asymmetric information. Firms choose their investments in physical capital before observing the characteristics of the labor markets they will face. We provide conditions under which equilibrium allocations are constrained...