 Multi-generational living arrangements are increasing in the U.S., and the data says it may be a good thing. Erin Real explains. A Harris poll found that 45% of young adults in their 20s are living with their parents, making it the most common living arrangement for that age group for the first time since the Great Depression. While this might initially seem like over-dependence among a generation, it turns out it's beneficial for all parties. The boomerang kids are contributing to household income and household labor.