How does intergenerational coresidence affect the physical health of middle-aged children? Evidence from China

Due to increasing longevity and decreasing fertility, the middle-aged generation has emerged as the primary caregivers for their elderly parents in China. Using the China Health and Retirement Longitudinal Survey, this study employs an endogenous treatment effect model to estimate the causal impact of intergenerational coresidence on the physical health of middle-aged children. The findings reveal that coresidence significantly deteriorates the physical health of middle-aged children. Notably, this effect is more pronounced in employed individuals compared to unemployed ones. Marginal effect analysis uncovers that coresidence has adverse effects on middle-aged children who are either particularly healthy or particularly unhealthy, while the marginal impact of coresidence on children in average health conditions is insignificant.