There are as many causes for this lost hour of sleep as there are types of family. Overscheduling of activities, burdensome homework, lax bedtimes, televisions and cell phones in the bedroom—they all contribute. So does guilt; home from work after dark, parents want time with their children and are reluctant to play the hardass who orders them to bed. (One study from Rhode Island found that 94% of high schoolers set their own bedtimes.)
