In recent decades, large infl ux of immigrants to the U.S. and other developed countries has made cities in these countries more ethnically diverse. In this paper, I aim to understand whether and how ethnic diversity affects communities in these cities. A general equilibrium model is built in...

We study urbanization and rural industrialization in a setting involving one urban region (U) and one rural region (R). Farmers are heterogeneous in their attitude toward migration, while firms' efficiency is higher in U than in R because agglomeration economies have been built in U. Farmers...

Canonical analysis of the classical general equilibrium model demonstrates the existence of an open and dense subset of standard economies that possess fully-revealing rational expectations equilibria. This paper shows that the analogous result is not true in urban economies under appropriate...

We model the behavior of rational forward-looking agents in a spatial economy. The economic geography structure is built on Fujita et al. (1999)'s racetrack economy. Workers choose optimally what to consume at each period, as well as which spatial itinerary to follow in the geographical space....

We develop a model of trade and agglomeration that incorporates trade in both intermediate goods and final goods and allows all firms to choose their locations. There are two types of labor: skilled labor, which is mobile, and unskilled labor, which is immobile. Upon choosing its factory site, a...

This paper provides a general equilibrium model where jurisdictions offer not only public goods, but also job opportunities. In a context of multiple types of consumers, labor complementarities, and anonymous crowding, heterogeneous populated communities form in equilibrium with an endogenous...

This paper numerically evaluates the efficiency of regulations on building size and city size in a congested closed city by comparing welfare gain with that achieved under a first-best toll regime. Results show that whereas the urban growth boundary (UGB) is a poor substitute for the toll regime...

Motivated by several empirical studies showing a positive relationship between residential density and vehicle fuel efficiency chosen by the residents, this paper presents a modified monocentric city model with endogenous vehicle-typechoices. Consumers are assumed to explicitly consider driving...

This paper investigates how layoffs due to import competition affect new and existing businesses at a highly local level. To conduct our analysis, we construct measures of import-related layoffs at the ZIP code level and combine these with ZIP code-level establishment counts. We find that...

We investigate whether a more concentrated regional industrial structure – the dominance of a few large firms in a given industry in a region – limits agglomeration economies and ultimately diminishes the economic performance of firms in that industry, especially small ones. In an...