因果推断的匹配方法

Basic steps for matching

The following are the basic steps in performing a causal analysis using data preprocessing (Stuart, 2010)¹:

1. Decide on covariates for which balance must be achieved
2. Estimate the distance measure (e.g., propensity score)
3. Condition on the distance measure (e.g., using matching, weighting, or subclassification)
4. Assess balance on the covariates of interest; if poor, repeat steps 2-4
5. Estimate the treatment effect in the conditioned sample

一些有用的R包