Online social capital, offline social capital and health: Evidence from China.

The fast-developing Internet is changing the way people interact, this new phenomenon helps people build and accumulate online social capital. However, the influence of online social capital on individual health is controversial. Based on the social capital theory, this study examined the effect of online social capital on health in subgroups with different levels of offline social capital. Data from the China Family Panel Studies of 2016 were used (N = 13,910), and the propensity score matching approach was used to address potential endogeneity problems. The results show that offline social capital had significant positive associations with individual health; although online social capital had few effects on individual health overall, significant health effects of online social capital were observed in subgroups with different offline social capital levels. In subgroups with less general trust and neighborhood social capital, more online social capital was associated with less depression; while in subgroups with more neighborhood social capital, more online social capital was associated with an elevated probability of two-week morbidity. Our findings further clarify the relationship between online/offline social capital and individual health. Online social capital can be considered as a supplement of offline social capital when it comes to health promotion, and more online contact should be encouraged when offline social capital of individuals or within the community is scarce.