Seventy-six fourth-grade children and their parents participated in a study of the linkages among parental control and positive affect, children's display rule use, and children's social competence with peers. Using observational measures of parental behavior and children's display rule use, it was found that parental positive affect and control were related to children's display rule use (including both positive and negative responses). Moreover, the links between parental affect and control and children's social competence one year later (as rated by teachers and peers) were found to be mediated by children's display rule use. Finally, fathers' behavior was found to be particularly important in the prediction of children's display rule use. The importance of fathers in children's social and emotional development and the importance of examining multiple parental behaviors are discussed.