%0 Journal Article %T Instrumental Variables Methods for the Correlated Random Coefficient Model: Estimating the Average Rate of Return to Schooling When the Return is Correlated with Schooling %A Heckman, James %A Vytlacil, Edward %A , %J The Journal of Human Resources %V 33 %N 4 %P 974 %@ 0022-166X %D 1998-01-01 %I JSTOR %~ DeepDyve