According to a study published in the Journal of Marriage and Family, fathers who work over 55 hours a week are more inclined to have sons exhibiting aggressive and delinquent behavior.
The WZB Berlin Social Science Research Centre conducted the study among 1,400 children in Western Australia, from ages five to 10 years old. One of their parents, usually the mother, completed a questionnaire about their child’s behavior, repeatedly at ages five, eight, and 10. 16 to 20 percent of the subjects had fathers who worked more than 55 hours each week.
The number of a mother’s working hours, though taken into account, did not seem to have any relation or influence on aggressive behavior in sons or daughters.
Study researcher Jianghong Li suggests that the effect may be so because without the father’s sufficient presence in the home, the sons don’t have a way to expend their high levels of energy through physical activity such as sports or to release aggressive energy.