Pingel, Ronnie; Waernbaum, Ingeborg - Institutet för Arbetsmarknads- och Utbildningspolitisk … - 2015
Propensity score based-estimators are commonly used to estimate causal effects in evaluation research. To reduce bias in observational studies researchers might be tempted to include many, perhaps correlated, covariates when estimating the propensity score model. Taking into account that the...