# Sample Selection Bias as a Specification Error

**James J. Heckman**

CiteWeb id: 19790000002

CiteWeb score: 28137

Sample selection bias as a specification error This paper discusses the bias that results from using non-randomly selected samples to estimate behavioral relationships as an ordinary specification error or «omitted variables» bias. A simple consistent two stage estimator is considered that enables analysts to utilize simple regression methods to estimate behavioral functions by least squares methods. The asymptotic distribution of the estimator is derived. (This abstract was borrowed from another version of this item.)

Links:- www.jstor.org/stable/1912352?origin=crossref
- www.vanpelt.sonoma.edu/users/c/cuellar/econ411/heckman.pdf
- https://ideas.repec.org/a/ecm/emetrp/v47y1979i1p153-61.html
- citec.repec.org/d/ecm/emetrp/v_47_y_1979_i_1_p_153-61.html
- econpapers.repec.org/RePEc:ecm:emetrp:v:47:y:1979:i:1:p:153-61
- www.sal.tohoku.ac.jp/~tsigeto/remcat/1979--00129682--47(1)--153.html

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