Transfer of tail information in censored regression models

Ingrid Van Keilegom, Michael G. Akritas

Research output: Contribution to journalArticle

49 Scopus citations

Abstract

Consider a heteroscedastic regression model Y = m(X) + σ(X)ε, where the functions m and σ are "smooth," and ε is independent of X. The response variable Y is subject to random censoring, but it is assumed that there exists a region of the covariate X where the censoring of Y is "light." Under this condition, it is shown that the assumed nonparametric regression model can be used to transfer tail information from regions of light censoring to regions of heavy censoring. Crucial for this transfer is the estimator of the distribution of ε based on nonparametric regression residuals, whose weak convergence is obtained. The idea of transferrring tail information is applied to the estimation of the conditional distribution of Y given X = x with information on the upper tail "borrowed" from the region of light censoring, and to the estimation of the bivariate distribution P(X ≤ x, Y < y) with no regions of undefined mass. The weak convergence of the two estimators is obtained. By-products of this investigation include the uniform consistency of the conditional Kaplan - Meier estimator and its derivative, the location and scale estimators and the estimators of their derivatives.

Original languageEnglish (US)
Pages (from-to)1745-1784
Number of pages40
JournalAnnals of Statistics
Volume27
Issue number5
StatePublished - Oct 1 1999

All Science Journal Classification (ASJC) codes

  • Statistics and Probability
  • Statistics, Probability and Uncertainty

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