Employment deconcentration: A new perspective on America's postwar urban evolution

In this study we show that during the postwar era the United States experienced a decline in the share of urban employment accounted for by the relatively dense metropolitan areas and a corresponding rise in the share of relatively less dense ones, This trend, which we call employment deconcentration, is distinct from the other well-known regional trend, namely, the postwar movement of jobs and people from the frostbelt to the sunbelt. We also show that deconcentration has been accompanied by a similar trend within metropolitan areas, wherein employment share of the more dense sections of MSAs has declined and that of the less dense sections risen. We provide a general equilibrium model with density-driven congestion costs to suggest an explanation for employment de concentration.