Work ethic is part of a broader field of attitudes, identified as cultural conservatism. The results of this longitudinal study--three repeated measurements with 620 adolescents and one of their parents as participants--show that parents' social economic status and educational level are associated with their cultural conservatism, and with the educational level and cultural conservatism of their children. During adolescence, parents effectively transfer their own cultural (non-)conservatism to their children. These socialization factors of adolescent cultural conservatism and adolescent educational level are important determinants of their work ethic. Lower educational level and higher cultural conservatisms of adolescents predict a stronger work ethic. Work ethic is a stable type of attitude, with work ethic at a younger age strongly predicting work ethic at a later age.