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Prof. James Heckman just published "Principles Underlying Econometric Estimators for Identifying Causal Effects" http://t.co/JKjqq2KWzn
Prof. James Heckman just published "Principles Underlying Econometric Estimators for Identifying Causal Effects" http://t.co/JKjqq2KWzn
Prof. James Heckman just published "Principles Underlying Econometric Estimators for Identifying Causal Effects" http://t.co/adGWBJqNJZ
Prof. James Heckman just published "Principles Underlying Econometric Estimators for Identifying Causal Effects" http://t.co/adGWBJqNJZ
Prof. James Heckman just published "Principles Underlying Econometric Estimators for Identifying Causal Effects" http://t.co/JKjqq2KWzn