Compares residential proximity patterns by race in U.S. and Canadian neighborhoods. The findings show that in the United States, but not in Canada, blacks appear to be at a disadvantage in the early stages of spatial assimilation, and other racial groups appear to actively avoid moving into neighborhoods with a dominant black presence. (GLR)

Aside from the growth of world population itself, urbanization is the dominant demographic trend of the late twentieth century. The number of people living in cities increased from six hundred million in 1950 to over two billion in 1986. If this growth continues unabated, more than half of humanity will reside in urban areas shortly after the turn…