This guide is intended to assist states and service delivery areas (SDAs) in addressing the new oversight responsibilities and opportunities stipulated by the Job Training Partnership Act (JTPA) with respect to net impact evaluations. The first chapter contrasts the objectives and provisions of JTPA with those of the Comprehensive Employment and Training Act (CETA). The literature review provided in the second chapter discusses previous studies that have analyzed the impacts of various employment and training programs and examines the implications of previous research for developing a state-level net impact model. The third chapter presents a conceptual framework for developing a state-level JTPA net impact mode. The conceptual framework, which builds on the results of the literature review, indicates the key outcome measures that should be examined, the subgroups of trainees for which impacts should be measured separately, the program activities (treatments) that should be examined, the types of economic and demographic characteristics that may affect outcomes, and the data sources that will be used to measure the aforementioned elements. A chapter on research design discusses various issues relating to the participant sample, use of a comparison group strategy, and sample sizes for the participant and comparison samples. The final chapter outlines a data analysis plan that addresses the issues of examining the adequacy of the comparision groups, estimating the net impacts of JTPA programs, obtaining net impact estimates for various subgroups, dealing with measurement error and other statistical issues, and making adjustments for potential data and design deficiencies. A sample JTPA application form is appended. (MN)