The Statistical Analysis of Quasi-Experiments

The Statistical Analysis of Quasi-Experiments by Christopher H. Achen is a foundational work for social scientists grappling with the realities of imperfect data. While randomized experiments remain the gold standard for causal inference, most research in political science, sociology, economics, and public policy relies on nonrandomized designs. Achen demonstrates that quasi-experiments—studies with nonrandom treatment groups or censored samples—pose unique statistical challenges that tradi...