By: Rector, Robert E., Fagan, Patrick F., and Kirk A. Johnson.
These researchers study data from the National Crime Victimization Survey and find that the rate of domestic violence for mothers with children (per thousand) is 51% lower for mothers who have ever been married than for mothers who have never been married. The rate of total victimization for mothers with children is 52% lower than for mothers who have never been married.
Marriage: Still the safest place for women and children. Heritage Foundation Backgrounder (1732): 1-4.