Gottfredson and Hirschi's general theory of crime has been widely tested. Yet one of their key hypothesesthe stability of self-controlhas received little attention from researchers, and no known study has examined the applicability of the stability hypothesis in a non-Western context. Given Gottfredson and Hirschi's claim that their low self-control theory transcends cultural and national boundaries, the authors tested the hypothesis with a nationally representative sample of South Korean adolescents using 5-year panel data. Consistent with studies conducted in the United States, the results offer partial support for Gottfredson and Hirschi's stability hypothesis. The authors also provide comparative interpretations of their findings in the South Korean context. (Published Abstract)