For the first time since 1880, more young people are living with their parents than with each other:
Adults between 18 and 34 are more likely to live with a parent than to get married or move in with a romantic partner, according to an analysis of Census data by the Pew Research Center. The researchers note that it's the first time in more than 130 years in which young adults have chosen their parents' homes over living on their own in a relationship.
In 2014, 32.1 percent of young adults were living with a parent, while 31.6 percent were living in what Pew calls a romantic relationship — either with a spouse or a partner.
In a separate recent report titled "Missing Young Adult Households," the National Association of Home Builders attributes a lack of demand for single-family homes to millennials living with mothers and fathers after graduating from college or high school. That study said 20 percent of people born 1981 to 1996 were living with parents.
The two organizations found a number of factors leading to these outcomes. In time this will reverse—assuming young people actually have enough families of their own.