Edwards Glaeser explains how you shrink a city:

Detroit has a large number of communities that are dominated by empty lots and vacant homes.  Mayor Bing has spoken of providing incentives for the people still living in such areas to relocate, and warned them that “if they stay where they are I absolutely cannot give them all the services they require.” For a big-city mayor to warn that some areas will be no-service zones is radical, but our country is filled with less populated areas that lack public trash removal, bus service and water provision.   In a sense, Mayor Bing would just be treating the least dense areas of Detroit like those other less dense areas.

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