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Smooth conditional distribution function and quantiles under random censorship
Eve Leconte1, Sandrine Poiraud-Casanova, Christine Thomas-Agnan
1G.R.E.M.A.Q., Université des Sciences Sociales, L.S.P., Université Paul Sabatier, Toulouse, France. leconte@cict.fr
Abstract:
We consider a nonparametric random design regression model in which the response variable is possibly right censored. The aim of this paper is to estimate the conditional distribution function and the conditional alpha-quantile of the response variable. We restrict attention to the case where the response variable as well as the explanatory variable are unidimensional and continuous. We propose and discuss two classes of estimators which are smooth with respect to the response variable as well as to the covariate. Some simulations demonstrate that the new methods have better mean square error performances than the generalized Kaplan-Meier estimator introduced by Beran (1981) and considered in the literature by Dabrowska (1989, 1992) and Gonzalez-Manteiga and Cadarso-Suarez (1994).
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