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A census tract study of Chicago from 1898 through 1940 shows that the foreign-born of each ethnic group eventually move radially from the first area of settlement. Those foreign groups that have lived the longest in Chicago have moved the farthest from the slums. The Negro Population has not moved in the same way as have other ethnic groups. The depression of the 1930's slowed up the outward movement.
Richard G. Ford (Fri,) studied this question.