Continuing with a recent theme I've developed on this blog, the economic situation facing young adults today in the U.S., I wanted to mention the recent book The Price of Independence: The Economics of Early Adulthood. Princeton University posted an interview with Cecilia Rouse, a co-editor of the book. In addressing trends of young adults living with their parents or with other, non-marital roommates, Rouse's answer encompasses more than just economic features:
When the [book's] authors looked at the different potential economic factors — debt, housing costs, the economy, etc. — they found that these factors do play some role in some of these changing trends... But you could also argue that in all of these countries, including the U.S., there have been big changes in the social norms.
I encourage everyone to read the full interview, which is available at the above link. Another good source for studies of the economics of young adults is the "Demos" research organization (list of articles by this group).
Happy Fourth of July everyone, and enjoy the fireworks!