Insomnia is a $63-billion drag on the economy, study says

http://www.latimes.com/health/boostershots/la-heb-insomnia-sleep-lost-productivity-20110901,0,3109967.story

Researchers from Harvard Medical School, the University of Michigan and elsewhere arrived at this figure by giving detailed questionnaires to more than 10,000 adults who were members of a large, nationwide health plan. The responses revealed that 23.2% of workers suffer from insomnia, as defined by psychiatrists and sleep experts. (Key factors include difficulty falling asleep, difficulty staying asleep and having sleep that isn’t restful or restorative.)