Research questions regarding how, for whom, and where a treatment achieves its effect on an outcome have become increasingly valued in substantive research. Such questions can be answered by causal moderated mediation analysis, which assesses the heterogeneity of the mediation mechanism underlying the treatment effect across individual and…

This is an evaluation of research on educational exchange, with emphasis on studies of foreign students in the United States. There are sections devoted to sources of research information, behavioral research, significant studies, and appropriate methodologies. Some suggestions are made for future research directions. A brief bibliography is…