Now that solo living is becoming increasingly popular around the world, we know much more about it than we did before. Below is what I have written on the topic so far. You may also want to take a look at the chapter on living alone in How We Live Now: Redefining Home and Family in the 21st Century.
Living Alone: The Basics
(Also see this collection of articles on solitude)
Implications for Society of the Rise of Solo Living
Living Alone: Backlash and Mockery
Living Alone: Some Other Topics and Themes
(Also check out this collection of articles on solitude)