Propensity Score Matching to Extract Latent Experiments from Nonexperimental Data: A Case Study

摘要: During the 1995–1996 academic year, investigators from College Board surveyed a random sample of high school junior and senior SAT® takers to probe how they had prepared for SAT. Among other questions, students were asked whether taken extracurricular test-preparation classes. Some 12% respondents said that had; comparison these students’ SAT scores those remaining 88% comprised observational study reported by Powers Rock (1999).