What Have We Learned From Major Longitudinal Surveys?
Longitudinal surveys involve repeated measures of the same people or of samples from the same population or of other units (such as areas). They can be compared with cross-sectional surveys, in which information is collected at one time only. The major advantage of longitudinal surveys lies in their ability to provide detailed information about the natural history and course of development of a phenomenon. In discussions about crime, the major phenomenon of interest is the criminal career.
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