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Activity Number: 608
Type: Contributed
Date/Time: Thursday, August 6, 2009 : 10:30 AM to 12:20 PM
Sponsor: IMS
Abstract - #305246
Title: Testing for a Changepoint in the Linear Hazard Rate Under Staggered Entry and Type I Censoring
Author(s): Matthew Williams*+ and Dong-Yun Kim
Companies: Virginia Polytechnic Institute and State University and Virginia Polytechnic Institute and State University
Address: 406-A Hutcheson Hall, Blacksburg, VA, 24061,
Keywords: linear hazard rate ; change-point ; likelihood ratio test ; staggered entry
Abstract:

In this talk we consider a test of an unknown change-point in the zero-intercept linear hazard rate function after which the slope changes. We assume that data are subject to staggered entry and type I censoring. We formulate the profile log-likelihood ratio test statistic as a function of the change-point and derive the limiting Gaussian process. From the supremum of the limiting process, we determine critical values of the asymptotic test and study the power of the test through simulation.

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