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	Policy Evaluation Doubly Robust Estimation	Propensitetspoängsviktning (PSW / IPW)
Ämnesområde	Kausal inferens	Kausal inferens
Familj	Regression model	Regression model
Ursprungsår	1994-2005	1983 (propensity score); 2003 (efficient IPW estimator)
Upphovsperson	Robins, Rotnitzky & Zhao (1994); Bang & Robins (2005)	Rosenbaum & Rubin (propensity score); Hirano, Imbens & Ridder (efficient weighting)
Typ	Semiparametric causal estimator	Causal inference / reweighting
Ursprungskälla	Bang, H., & Robins, J. M. (2005). Doubly robust estimation in missing data and causal inference models. Biometrics, 61(4), 962-973.	Rosenbaum, P. R., & Rubin, D. B. (1983). The central role of the propensity score in observational studies for causal effects. Biometrika, 70(1), 41-55.
Alias	DR estimation for policy, augmented IPW for policy evaluation, AIPW policy evaluation, doubly robust policy analysis	PSW, inverse probability weighting, IPW, propensity-based weighting
Närliggande	5	6
Sammanfattning	Policy Evaluation Doubly Robust Estimation applies the doubly robust (DR) estimator to assess the causal effect of a public policy or programme. It combines a model of treatment assignment (propensity score) with a model of the outcome, and requires only one of the two models to be correctly specified to produce a consistent estimate of the average treatment effect, making it a resilient tool for programme evaluation.	Propensity score weighting is a causal-inference method that reweights observations so that the covariate distributions of treated and untreated units look exchangeable, enabling unbiased estimation of average treatment effects from observational data. Each unit receives a weight that is the inverse of its probability of receiving the treatment it actually received — a strategy formalised by Rosenbaum and Rubin (1983) and given its efficient semiparametric form by Hirano, Imbens and Ridder (2003).