Ki Uk Kim, Hye-Kyung Park, Hee Young Jung, Jong-Joon Ahn, Eunsoo Moon, Yun Seong Kim, Min Ki Lee, Haejung Lee
Association of depression with disease severity in patients with chronic obstructive pulmonary disease
Lung
estimating population descriptive statistics weighting called needed make analysis sample representative target population regard research directed instead estimating causal effects discuss three distinct weighting motives 1 achieve precise estimates correcting heteroskedasticity 2 achieve consistent estimates correcting endogenous sampling 3 identify average partial effects presence unmodeled heterogeneity effects case find motive sometimes apply situations practitioners often assume