Fig. 2From: Heckman-type selection models to obtain unbiased estimates with missing measures outcome: theoretical considerations and an application to missing birth weight dataMonte Carlo Simulation Results. Shows empirical distribution of estimates in Monte Carlo Simulation and are based on 1000 random data draws. OLS: ordinary least squares. MAR: missing at random. MNAR: missing not at random. MICE: Multiple imputations by chained equationBack to article page