We take up these issues using the GSMS dataset. Specifically, we examine the developmental relationship between DSM-IV ODD and CD, capitalizing on longitudinal follow-ups that now cover the years from late childhood to early adulthood. We examine the hypothesis that transitions between ODD and CD may be more common in earlier developmental periods, and test whether these transitions are explained by sub-threshold CD symptomatology. We also examine the correlates and outcomes of youth who meet criteria for CD only, ODD only and mixtures of the two disorders across the course of adolescence. Finally we present a factor analysis of ODD symptoms to identify separable dimensions of oppositional behavior, and examine outcomes of these dimensions in adolescence.