Map Data from 1927 to 1938 in Shaw and McKay Juvenile Delinquency in Urban Areas.

In 1969, Clifford Shaw and Henry D. McKay released the second edition of Juvenile delinquency and urban areas. Their book conducts statistical analysis, without the benefit of computers, on the impact of various socio-economic issues on juvenile delinquency in Chicago, Philadelphia, Boston, Cleveland, Cincinnati, and Richmond. Chicago is the major focus of the research with analysis exploring three time periods within the city 1900 to 1906, 1917 to 1923, and 1927 to 1933. The suburbs are also analyzed from 1934 to 1966. The book contains a number of maps with the rates of delinquency and socio-economic factors divided into “square mile areas”. These are explained by Shaw and McKay (see page 29 footnote 5) as “the basic units the city of Chicago was divided for the presentation of rates of delinquency and other data”. The rate data from 1927 to 1938 is divided into140 ‘square mile areas’ (which in many cases are more than a square mile in area). <br>