CityLab editor-at-large Richard Florida puts the spotlight on a new study that digs into the connection between land-use restrictions and the economic segregation of metros.

The study by Michael C. Lens and Paavo Monkkonen from UCLA’s Luskin School of Public Health, published in the Journal of the American Planning Association, uses new and better measures for both segregation and land-use restrictions to examine this relationship in 95 large metropolitan areas in 2000 and 2010.

The researchers came up with several interesting findings. Florida writes:

Density restrictions work to increase segregation, mainly by exacerbating the concentration of affluence. This contradicts the commonly held belief that exclusionary zoning leads to the concentration of the poor. Instead, the authors find that the main effect of density restrictions is to enable the wealthy to wall themselves off from other groups.

The study also finds that segregation is lower in cities and metros where state governments are more involved in land-use regulation, residential development, and growth management.

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