As of 2010, the world contained 4,231 cities with 100,000 or more people. The Atlas of Urban Expansion collects and analyzes data on the quantity and quality of urban expansion in a stratified global sample of 200 cities. The Atlas is a multi-phase research effort by the NYU Urban Expansion Program at the Marron Institute of Urban Management and the Stern School of Business of New York University, in partnership with UN-Habitat and the Lincoln Institute of Land Policy. Continue reading