More Americans Are Doubling-Up: More people are living with family amid high unemployment rates and a slow economy, but while the phenomenon is keeping the poverty rate lower, it has wider negative economic consequences.... [T]he Census Bureau noted a big jump in the number of individuals and families doubling up. Census says 69.2 million, or 30%, were doubled-up in 2011, up from 61.7 million adults, or 27.7%, in 2007.... Fewer households means fewer consumers for businesses desperate for demand. (You don’t need to buy a new TV if you can just use mom and dad’s.) At the same time, it continues to drag on a housing market that needs to burn off excess supply.... Necessity is likely the primary driver of the increase in doubling-up. Many of these families and children living at home may want to make the jump out on their own as soon as their economic standing improves. That could represent a strong shadow demand for housing, as well as a potential jump in household formation with a resultant boost in consumption.