In the 2006 comedy “Failure to Launch,” 35-year-old Tripp enjoys all the advantages of living at home with mom and dad. Zaniness ensues when the parents – eager for independence – hire an expert to nudge Tripp out of the nest.

Fast forward and forget the Hollywood comic vehicle. The idea of millennials living at home has gone from social stigma to social trend, even approaching social expectation. In 2014, the Pew Research Center reports, 32 percent of 18-to-34-year-olds were living with a parent – more than at any time since around 1940.

Read more at The Wall Street Journal (subscription required).