A maximum smoothed likelihood estimator in the current status continuous mark model

作者：Groeneboom Piet; Jongbloed Geurt; Witte Birgit I^*

来源：Journal of Nonparametric Statistics, 2012, 24(1): 85-101.

DOI：10.1080/10485252.2011.621952

• bivariate distribution function
• censored data
• pointwise consistency
• histogram estimator
• Kullback-Leibler divergence

We consider the problem of estimating the joint distribution function of the event time and a continuous mark variable based on censored data. More specifically, the event time is subject to current status censoring and the continuous mark is only observed in case inspection takes place after the event time. The nonparametric maximum likelihood estimator in this model is known to be inconsistent. We propose and study an alternative likelihood-based estimator, maximising a smoothed log-likelihood, hence called a maximum smoothed likelihood estimator (MSLE). This estimator is shown to be well defined and consistent, and a simple algorithm is described that can be used to compute it. The MSLE is compared with other estimators in a small simulation study.

• 出版日期2012