This Chicago Census Roundup: Why Is Chicago Shrinking? probably does justice to the housing-stock issue but like other analyses treats the black-loss matter in terms solely of migration. But what about the black abortion rate?

Blacks . . . have much higher rates of abortions than whites or other minority groups. In 2000, while blacks made up 17 percent of live births, they made up more than twice that share of abortions (36 percent). . . . . The comparison with whites and other minorities is striking. Whites made up 78 percent of live births, but only 57 percent of abortions. Non-black minorities had 7 percent of live births and 5 percent of abortions.

In other words, there are fewer blacks in general, especially in big cities:

. . . black flight isn’t solely a Chicago phenomenon. New York’s black population declined as well, while the black populations of major Southern metropolises grew.

Unreasonable?