The Migrant Student Record Transfer System (MSRTS) is a nationwide computer-based communications network originally designed to transfer the health and educational records of migrant workers' children. This report assesses MSRTS data from September 1984 through June 1986 to determine the potential utility of such data for national studies of the Migrant Education Program (MEP). Findings include: (1) 51% of currently migrant students were enrolled in only one MEP school during the period; 27% were enrolled twice; (2) recruitment and enrollment of currently migrant students were least successful in Eastern Stream states; (3) only 46% of all enrolled eligible children received services funded by MEP; (4) MSRTS achievement test data were not nationally representative of MEP participants and could not be used for a valid national study of MEP student achievement; and (5) frequent retesting of migrant children could have produced test wiseness and invalid test scores. Overall, the quality of the data was unexpectedly high, and limitations on analysis arose primarily from missing data due to the voluntary nature of data entry. Existing MSRTS data can be used in analyses that answer educational policy questions about: (1) the population receiving services and the services received; (2) differences in the characteristics and needs of formerly versus currently migrant students; and (3) the relative effectiveness of varying service delivery methods. The gap reduction model and a formative analysis using multiple regression are appropriate models for analysis of MSRTS data. This report contains 46 tables, a sample MSRTS student record, and recommendations for improving MSRTS for research purposes. (SV)