نقش سرمایه اجتماعی در کاهش پریشانی روانی غیر اختصاصی: اهمیت کنترل اریب متغیرهای حذف شده

We find that lagged area-level social capital is negatively related to non-specific psychological distress among individuals whose family income is less than the median. These associations are much larger when we control for non-time-varying area-level omitted variables.