Nielsen, Jens Perch; Tanggaard, Carsten and Jones, M. C.
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|DOI (Digital Object Identifier) Link:||http://doi.org/10.1080/02331880701736648|
|Google Scholar:||Look up in Google Scholar|
A class of local linear kernel density estimators based on weighted least-squares kernel estimation is considered within the framework of Aalen's multiplicative intensity model. This model includes the filtered data model that, in turn, allows for truncation and/or censoring in addition to accommodating unusual patterns of exposure as well as occurrence. It is shown that the local linear estimators corresponding to all different weightings have the same pointwise asymptotic properties. However, the weighting previously used in the literature in the i.i.d. case is seen to be far from optimal when it comes to exposure robustness, and a simple alternative weighting is to be preferred. Indeed, this weighting has, effectively, to be well chosen in a 'pilot' estimator of the survival function as well as in the main estimator itself. We also investigate multiplicative and additive bias-correction methods within our framework. The multiplicative bias-correction method proves to be the best in a simulation study comparing the performance of the considered estimators. An example concerning old-age mortality demonstrates the importance of the improvements provided.
|Item Type:||Journal Article|
|Copyright Holders:||2009 Taylor & Francis|
|Keywords:||Aalen's multiplicative model; additive bias correction; censoring; counting processes; exposure robustness; kernel density estimation; multiplicative bias correction; old age mortality|
|Academic Unit/Department:||Faculty of Science, Technology, Engineering and Mathematics (STEM) > Mathematics and Statistics
Faculty of Science, Technology, Engineering and Mathematics (STEM)
|Depositing User:||Sarah Frain|
|Date Deposited:||10 Aug 2010 11:49|
|Last Modified:||04 Oct 2016 14:17|
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