A review published in this month’s issue of Acta Paediatrica says that active fathers play a key role in reducing behavioral problems in boys and psychological problems in girls. The comprehensive review (which you can read in full here) looked at 24 papers published between 1987 and 2007 on the role of the father in childhood development.
After reviewing the studies, researchers concluded that boys with active fathers are less likely to experience behavioral problems as they mature:

