Fig. 1. Percent loss of housing units in (A) New York City and (B) the Bronx between 1970 and 1980. The geographic units are the designated health areas that encompass 10 census tracts; at the time of designation in the 1960s, they were socioeconomically homogeneous, with average populations of 20,000. The areas that lost > 20% of housing units are all in zones with high levels of poverty: South Bronx, Harlem, the Lower East Side, and the poverty belt of Brooklyn from Bedford-Stuyvesant through Brownsville/East New York.