Living Alone: What Are the Consequences of Going Solo?

Remember when living alone carried something of a stigma?  Well, according to the latest census, those days are gone. Nearly half of adult Americans are single and nearly a third of all households have just one resident. Thirty-one million Americans live alone, almost eight times as many as in 1950. Are all these "singletons," as they're called, happy and healthy, or lonely and isolated?