Sample selection versus two-part models revisited: the case of female smoking and drinking

J Health Econ. 2008 Mar;27(2):300-7. doi: 10.1016/j.jhealeco.2007.07.001. Epub 2007 Nov 29.


There is a well-established debate between Heckman sample selection and two-part models in health econometrics, particularly when no obvious exclusion restrictions are available. Most of this debate has focussed on the application of these models to health care expenditure. This paper revisits the debate in the context of female smoking and drinking, and evaluates the two approaches on three grounds: theoretical, practical and statistical. The two-part model is generally favoured but it is stressed that this comparison should be carried out on a case-by-case basis.

MeSH terms

  • Adult
  • Alcohol Drinking*
  • Female
  • Humans
  • Ireland
  • Models, Econometric
  • Models, Statistical
  • Sampling Studies
  • Smoking*