This study examines the distribution differences across sexes in key measures of self-control theory and differences in a causal model. Using cross-sectional data from juveniles ("n" = 1,500), the study shows mean-level differences in many of the self-control, risky behavior, and delinquency measures. Structural equation modeling findings support Gottfried's and Hirschi's causal model for males and females. However, multiple-groups structural equation modeling findings support the theory that differences in the measures and causal model are present for both sexes. (Contains 8 notes, 1 table, and 1 figure.)