Redfin analyst Lorraine Woellert filters a few data sets here for consideration. One, from Goldman Sachs economists Hui Shan and Daan Struyven, explores the phenomenon of "basement-dwelling millennials," seeking correlative ties to jobs and economic trends.
The conclusion is that, yes, there's a strong tie between elevated rates of young-adult children living at home in their parents' basements and labor conditions. But that's not all of it. Woellert writes:
In fact, most of the variation between countries can’t be explained away by economic conditions. Part of it must be cultural, the economists wrote.
And if it is cultural, the U.S. could be experiencing a shift in societal norms. Will more young adults live at home not because they have to, but simply because it’s more acceptable?