This report provides an analysis of young men in the Parnes National Longitudinal Surveys who were enrolled in manpower programs from 1963 to 1972. It provides information on the Probability that members of the 5,225 sample would enter a manpower program, given personal and economic characteristics. The report evaluates the relationship of manpower program participation to annual earnings from 1963 to 1972 (using Social Security Administration data); and draws comparisons for different types of programs and duration of participation among the enrollees. It also makes comparisons with those in the Parnes sample who did not enroll. (Author)