i cant imagine that having dad at home really determines any kids chances one way or another.
It can have a huge impact.
The statistics on unwed teen mothers are striking as it relates to which of them did and did not have a father at home. Kids whose dads are seldom at home or not around are also far more likely to exhibit bullying behaviors at younger ages. There are so many studies along these lines, books, etc.
My wife has spent a lot of time working with at risk teen girls. It's to the point where she can observe a group of girls and eerily pick out which girls have fathers in their lives, and which ones don't.
Kids need attention, they need boundaries and they need discipline. When they don't have it, they find attention and acceptance wherever they can, and far too often that is in bad places and behaviors.
Fatherless children are at a dramatically greater risk of drug and alcohol abuse, mental illness, suicide, poor educational performance, teen pregnancy, and criminality.
Source: U.S. Department of Health and Human Services, National Center for Health Statistics, Survey on Child Health, Washington, DC.
"...the absence of the father in the home affects significantly the behavior of adolescents and results in the greater use of alcohol and marijuana."
Source: Deane Scott Berman, "Risk Factors Leading to Adolescent Substance Abuse," Adolescence 30 (1995)
Fatherless children are at dramatically greater risk of suicide.
Source: U.S. Department of Health and Human Services, National Center for Health Statistics, Survey on Child Health, Washington, DC.
In 1988, a study of preschool children admitted to New Orleans hospitals as psychiatric patients over a 34-month period found that nearly 80 percent came from fatherless homes.
Source: Jack Block, et al. "Parental Functioning and the Home Environment in Families of Divorce," Journal of the American Academy of Child and Adolescent Psychiatry, 27 (1988)
In a longitudinal study of 1,197 fourth-grade students, researchers observed "greater levels of aggression in boys from mother-only households than from boys in mother-father households."
Source: N. Vaden-Kierman, N. Ialongo, J. Pearson, and S. Kellam, "Household Family Structure and Children's Aggressive Behavior: A Longitudinal Study of Urban Elementary School Children," Journal of Abnormal Child Psychology 23, no. 5