\contentsline {begintocitem}{}{}{} \contentsline {jobname}{Doksum}{}{} \contentsline {doi}{0003/0000.0000}{}{} \contentsline {arxiv}{math.PR/0000003}{}{} \contentsline {title}{Semiparametric Models and Likelihood - The Power of Ranks}{66}{} \contentsline {author}{Kjell Doksum and Akichika Ozeki}{67}{} \contentsline {endtocitem}{}{}{} \contentsline {section}{\numberline {1}Introduction}{67}{section.1} \contentsline {subsection}{\numberline {1.1}Lehmann Type Models. Cox Regression}{67}{subsection.1.1} \contentsline {subsection}{\numberline {1.2}Sklar Type Models. Copula Regression}{67}{subsection.1.2} \contentsline {section}{\numberline {2}Proportional Hazard and Proportional Expected Hazard Rate Models}{68}{section.2} \contentsline {section}{\numberline {3}Rank, Partial and Marginal Likelihood}{70}{section.3} \contentsline {section}{\numberline {4}Profile NP Likelihood}{72}{section.4} \contentsline {section}{\numberline {5}Profile NP Likelihood for the PEHR Model}{73}{section.5} \contentsline {subsection}{\numberline {5.1}The MM Algorithm}{74}{subsection.5.1} \contentsline {subsection}{\numberline {5.2}The MM Algorithm for the PEHR Model with $\theta \geq 0$ (SINAMI with $\theta \geq 0$)}{74}{subsection.5.2} \contentsline {subsection}{\numberline {5.3}The MM Algorithm for the SINAMI Model with $\theta \leq 0$}{75}{subsection.5.3} \contentsline {subsection}{\numberline {5.4}The MM Algorithm for the SINAMI Model with $\theta \in R$}{75}{subsection.5.4} \contentsline {subsection}{\numberline {5.5}Profile NPMLE Implementation}{75}{subsection.5.5} \contentsline {subsection}{\numberline {5.6}Estimation of the Variance of the Profile NPMLE}{77}{subsection.5.6} \contentsline {section}{\numberline {6}Simulation Results}{77}{section.6} \contentsline {subsection}{\numberline {6.1}PEHR Model Estimates}{77}{subsection.6.1} \contentsline {subsection}{\numberline {6.2}Model Fit for Misspecified Model}{78}{subsection.6.2} \contentsline {section}{\numberline {7}Estimation in the Normal Copula Model}{78}{section.7} \contentsline {subsection}{\numberline {7.1}The One Covariate Case}{78}{subsection.7.1} \contentsline {subsection}{\numberline {7.2}The Multivariate Covariate Case}{81}{subsection.7.2} \contentsline {section}{\numberline {8}Transformation and NP Models}{81}{section.8} \contentsline {subsection}{\numberline {8.1}Simulation Results}{84}{subsection.8.1} \contentsline {subsubsection}{\numberline {8.1.1}Correctly Specified Model}{84}{subsubsection.8.1.1} \contentsline {subsubsection}{\numberline {8.1.2}Misspecified Model}{84}{subsubsection.8.1.2} \contentsline {section}{Acknowledgements}{91}{section*.3} \contentsline {section}{References}{91}{section*.5}