Methoden vergelijken

	Beleidsevaluatie met Propensity Score Matching	Propensity Score Weighting (PSW / IPW)
Vakgebied	Causale inferentie	Causale inferentie
Familie	Regression model	Regression model
Jaar van ontstaan	1983; policy evaluation adaptation 1997	1983 (propensity score); 2003 (efficient IPW estimator)
Grondlegger	Rosenbaum & Rubin (1983); Heckman, Ichimura & Todd (1997) for program/policy evaluation application	Rosenbaum & Rubin (propensity score); Hirano, Imbens & Ridder (efficient weighting)
Type	Quasi-experimental matching estimator	Causal inference / reweighting
Oorspronkelijke bron	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.	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.
Aliassen	PSM policy evaluation, policy PSM, propensity matching for program evaluation, PSM treatment evaluation	PSW, inverse probability weighting, IPW, propensity-based weighting
Verwant	6	6
Samenvatting	Policy evaluation propensity score matching applies the propensity score framework — originally developed by Rosenbaum and Rubin (1983) and operationalized for program evaluation by Heckman et al. (1997) — to estimate the causal effect of a policy intervention. It constructs a credible comparison group from non-participants by matching them to participants on their estimated probability of receiving the treatment, enabling unbiased effect estimation without random assignment.	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).