This paper reports on a research study of the long-term effects of a high school home-stay experience for German and American students who participated in the Youth For Understanding program in the 1950s, 1960s, 1970s and 1980s. With emphasis on the German sample, this paper (1) briefly describes the study's methodology, (2) provides an overview of major findings, and (3) poses the question: what next? (Contains 1 table and 1 figure.)