DID(difference-in-difference) & PSM(propensity score model)
$PSM-DID$_논문작성 관점(한글)
Propencity Score Matching with R (한글, 쉬운 설명)
Propencity Score Matching 튜토리얼(R)_영어
Propencity Score Matching 초급 튜토리얼(R)_영어(stanford)