One of a series of sixteen knowledge transformation papers, this paper examines the advantages and disadvantages of longitudinal studies as a method for evaluating vocational programs. First, longitudinal methods are defined for the differences between them and cross-sectional studies are established. The results of a literature search conducted…

The seven articles of this special issue focus on theory and research related to survey methods and whether evaluators need information that is absent from the larger survey literature. These articles reflect the view that the considerations relating to good survey research apply also to using surveys in evaluation. (SLD)