Poor parenting -- including overprotection -- increases bullying risk

"Children who are exposed to negative parenting – including abuse, neglect but also overprotection – are more likely to experience childhood bullying by their peers, according to a meta-analysis of 70 studies of more than 200,000 children.

"The research, led by the University of Warwick and published in the journal Child Abuse & Neglect, found the effects of poor parenting were stronger for children who are both a victim and perpetrator of bulling (bully-victims) than children who were solely victims...."

http://www.eurekalert.org/pub_releases/2013-04/uow-pp042413.php