Semiparametric Models with Covariates for Lifetime Data under a General Censoring Scheme with an Application to Contingent Valuation

We are interested in estimating the distribution of lifetimes, also called survival times, subject to a general censoring scheme called ``middle censoring'' (see Jammalamadaka and Mangalam (2003)). Both the Cox proportional hazards (Cox PH) and accelerated failure time (AFT) models are con...

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Published inStatistica (Bologna) Vol. 76; no. 4; pp. 327 - 339
Main Authors Bennett, Nathan, Iyer, Srikanth K, Sreenivasa Rao Jammalamadaka
Format Journal Article
LanguageEnglish
Published Bologna Università degli Studi di Bologna, Department of Statistical Sciences, Alma Mater Studiorum 01.01.2016
University of Bologna
Subjects
accelerated failure time model (AFT)
contingent valuation
Cox PH model
Economic models
middle censoring
Parameter estimation
Studies
Valuation
willingness to pay
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ISSN0390-590X
1973-2201
DOI10.6092/issn.1973-2201/6140

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Summary:We are interested in estimating the distribution of lifetimes, also called survival times, subject to a general censoring scheme called ``middle censoring'' (see Jammalamadaka and Mangalam (2003)). Both the Cox proportional hazards (Cox PH) and accelerated failure time (AFT) models are considered since each model has a baseline distribution function that is modified by the presence of covariates. The key contribution presented is the estimation of the effect of the covariate as well as the baseline distribution function. We conclude with an application to a contingent valuation study.
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ISSN:0390-590X
1973-2201
DOI:10.6092/issn.1973-2201/6140