An investigation of the advantages and disadvantages of collecting data on graduates of manpower training programs from the firms that employ them, and an evaluation of four local training programs: on-the-job training, Opportunities Industrialization Center, South Central Los Angeles Youth Training and Employment Project, and East Los Angeles Youth Training and Employment Project. The analysis does not show a clear-cut advantage for any one program. If success is measured in terms of wages, however, trainees associated with on-the-job training programs have been relatively more successful. The employer approach to follow-up on graduates of manpower training programs yields inexpensive but relatively limited data. Fundamental problems were encountered in developing meaningful measures of success and in coping with collinearity among sets of independent variables. These problems and approaches that can contribute to their solution are discussed. 87 pp.