The authors propose a novel approach to analyze core—periphery models. By expressing the model in terms of relative wages, the authors characterize market equilibria and full equilibria in which no migration incentives exist. The authors reconsider Krugman’s model and show that...

The spatial concentration of firms has long been a central issue in economics under both the theoretical and the applied point of view mainly due to the important policy implications. A popular approach to its measurement, which does not suffer from the problem of the arbitrariness of the...

This article proposes that decentralization and deconcentration in the United States be measured by tracking the proportion of people or jobs in fixed categories of places across census years, using metropolitan areas designated in each year rather than the fixed-year standard employed in...