Comparing different propensity score estimation methods for estimating the marginal causal effect through standardization to propensity scores. - Safoora Gharibzadeh; Mohammad Ali Mansournia; Abbas Rahimiforoushani; Ahad Alizadeh; Atieh Amouzegar; Kamran Mehrabani-Zeinabad; Kazem Mohammad (Commun. Stat. Simul. Comput., 2018)