The term "city" in the CDA refers to incorporated places with a 1990 population of 25,000 or more. Incorporated places in this data set are those reported to the Census Bureau as legally in existence on January 1, 1990, under the laws of their respective states as cities, boroughs, towns, and villages.
Data set I1 includes socio-economic and demographic data for all cities in the US. I1 has 207 variables for 1,083 cities.
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