The Common Structure of Statistical Models of Truncation, Sample Selection and Limited Dependent Variables and a Simple Estimator for Such Models
The Common Structure of Statistical Models of Truncation, Sample Selection and Limited Dependent Variables and a Simple Estimator for Such Models was written by James J. Heckman in 1976. It was published in the Annals of Economic and Social Measurement (vol. 5, no. 4).
The motivating question is modeling the wages of married women. There is non-ignorable selection bias through the self-selection (i.e., those not seeking employment, and so receiving zero wages).
The author introduces a two step method for estimating this censored regression model.