Most children of divorce also do well in the longer term. In a quantitative review of the literature in 2001, sociologist Paul R. Amato, then at Pennsylvania State University, examined the possible effects on children several years after a divorce. The studies compared children of married parents with those who experienced divorce at different ages. The investigators followed these kids into later childhood, adolescence or the teenage years, assessing their academic achievement, emotional and behavior problems, delinquency, self-concept and social relationships. On average, the studies found only very small differences on all these measures between children of divorced parents and those from intact families, suggesting that the vast majority of children endure divorce well.