2010
DOI: 10.1007/s00362-010-0306-9
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When does Heckman’s two-step procedure for censored data work and when does it not?

Abstract: Abstract:Heckman's two-step procedure (Heckit) for estimating the parameters in linear models from censored data is frequently used by econometricians, despite of the fact that earlier studies cast doubt on the procedure. In this paper it is shown that estimates of the hazard h for approaching the censoring limit, the latter being used as an explanatory variable in the second step of the Heckit, can induce multicollinearity. The influence of the censoring proportion and sample size upon bias and variance in th… Show more

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Cited by 5 publications
(3 citation statements)
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“…It is clear from (3) that OLS will be biased if ρ = 0. In applications the inverse Mills' ratio is often close to linear in u (Puhani 2000;Jonsson 2012) and this is also the case in our example, see Fig. 1.…”
Section: Motivating Studiessupporting
confidence: 76%
“…It is clear from (3) that OLS will be biased if ρ = 0. In applications the inverse Mills' ratio is often close to linear in u (Puhani 2000;Jonsson 2012) and this is also the case in our example, see Fig. 1.…”
Section: Motivating Studiessupporting
confidence: 76%
“…Arabmazar and Schmidt 1982;Brännäs and Laitila 1989). The same applies also to Heckman's two-step estimator (see Jonsson 2012).…”
Section: Introductionmentioning
confidence: 86%
“…O segundo é a esperança do valor financiado (valor da fatura que o indivíduo deixou de pagar) quando o cliente não paga a fatura total. As estimativas são obtidas a partir do modelo de dois estágios de Heckman (Maddala, 1983;Dow e Norton, 2003;Jonsson, 2012). No primeiro estágio é ajustada a probabilidade do cliente não pagar a fatura total através de um modelo probito.…”
Section: Introductionunclassified