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An attempted exact replication, after 30 year, of s study of the moral integration of large American cities yields far less conclusive results than the original. One element at fault is a component of the moral integration index-the werlfare effort index. When this is omiteed and an index of crime is used as the sole indicator of moral integration, the independent variables of heterogeneity, in-migration, and dwelling value spread achieve added power; but the success of the first study is not duplicated. When population size is added as an independent variable results are improved somewhat. A comparison of 40 cities common to both studies shows greater homogeneity among them in 1970 than in 1940, probably because in-migration has faced them with similar problems.
Robert C. Angell (Fri,) studied this question.