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- W2885347166 abstract "Propensity and prognostic score methods are two statistical techniques used to correct for the selection bias in nonexperimental studies. Recently, the joint use of propensity and prognostic scores (i.e., two-score methods) has been proposed to improve the performance of adjustments using propensity or prognostic scores alone for bias reduction. The main purpose of this dissertation study was to evaluate the effectiveness of the joint use of propensity and prognostic scores for reducing bias of treatment effect estimates in quasi-experimental designs. To this end, a simulation study based on real educational data was conducted to investigate the comparative performance of separate and combined use of propensity and prognostic scores for recovering a simulated treatment effect under various conditions. These conditions were based on different control group sizes, outcome measures, and propensity score estimation methods. Specifically, four two-score methods were examined in this study: weighting and 1:1 optimal matching on the estimated prognostic propensity scores, and 1:1 and full matching on a Mahalanobis distance combining the estimated propensity and prognostic scores. Single score adjustments that were examined included 1:1 matching on the estimated propensity or prognostic scores, and weighting on the estimated propensity scores. The simulation results did not support the use of any of the two-score methods as alternatives to single score adjustments in estimation of treatment effects in the examined conditions. Instead, matching on the estimated prognostic scores showed some advantages over all the two-score methods and single score adjustments involving propensity scores only. However, this seemingly promising finding for adjustments on prognostic scores is tempered by the inherent “in-sample” problems for estimating prognostic scores." @default.
- W2885347166 created "2018-08-22" @default.
- W2885347166 creator A5015402543 @default.
- W2885347166 date "2018-06-26" @default.
- W2885347166 modified "2023-10-18" @default.
- W2885347166 title "EXPLORING THE JOINT USE OF PROPENSITY AND PROGNOSTIC SCORES FOR BIAS REDUCTION IN THE CONTEXT OF SMALL EDUCATIONAL PROGRAM EVALUATIONS" @default.
- W2885347166 hasPublicationYear "2018" @default.
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