Children with divorced parents shoulder twice the financial burden for their own college costs than those from intact homes, because their parents contribute less than married parents.That's the word from a recent study conducted by Ruth N. López Turley, associate professor of sociology at Rice University, and Matthew Desmond, a junior fellow at Harvard University, called, "Contributions to College Costs by Married, Divorced, and Remarried Parents."Using data from the National Postsecondary Student Aid Study, Lopez and Desmond found that children from married homes had to cover 23 percent of their own college expenses, while those from divorced homes had to pay 58 percent.