Chicago Since 1840: A Timeseries Data Handbook. Wesley G. Skogan.
 This handbook presents an extensive collection of time-series data for the City of
Chicago. The variables range from automobile ownership to indicators of the strength of
the city’s representation in the Illinois state legislature. The data are presented in nine
tables, divided into conceptually useful clusters. The longest series spans 134 years.
Chicago became a city in 1836, and an attempt was made to assemble each series
beginning in 1840, the year of the city’s first decennial census.
Crime Trends