“…2,11 By the 1950s, census tracts were employed in research on health, fertility, immigration, marriage, social stratification, crime, employment, education, residential segregation, and urban ecology, as summarized in the American Statistical Association's monograph on the Golden Anniversary of Census Tracts, 1956, 2 and the 1955 landmark publication of Social Area Analysis by Eshref Shevsky and Wendell Bell. 11 A major 1959 review paper on BAnalysis of Vital Statistics by Census Tract,^written by Elizabeth J. Coulter and Lillian Guralnick, and published in the Journal of the American Statistical Association, 12 reported on results of a survey of official health agencies Bon the current uses of census tract data with special references to studies of health as related to socioeconomic status.^Results indicated not only strong interest and growing use of these data but also a desire to have census tracts delimited throughout the United States. Looking ahead, the article proposed that census tract data be used to develop a consistent socioeconomic measure that could be used nationwide in order to Bpermit assessment of mortality rates between and within cities and serve to extend considerably an understanding of conditions producing differential mortality^as well as Bhelp in evaluation of other factors in mortality such as air pollution, climate, or the impact of city services.^1 2, pp.…”