Transcription of Methods for Constructing and Assessing Propensity Scores
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Methods for Constructing and Assessing Propensity Scores
Methods for Constructing and AssessingPropensity ScoresMelissa M. Garrido, Amy S. Kelley, Julia Paris, Katherine Roza,Diane E. Meier, R. Sean Morrison, and Melissa D. model the steps involved in preparing for and carrying out propensityscore analyses by providing step-by-step guidance and Stata code applied to an empiri-cal , Stata code, and empirical examples are given to illustrate(1) the process of choosing variables to include in the Propensity score ; (2) balance ofpropensity score across treatment and comparison groups; (3) balance of covariatesacross treatment and comparison groups within blocks of the Propensity score ; (4)choice of matching and weighting strategies.
propensity score’s distribution can be obtained by splitting the sample by quintiles of the propensity score. Astarting test of balance is to ensure that the mean propensity score is equivalent in the treatment and comparison groups within each of the five quintiles (Imbens 2004). If it is not equivalent, one or
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