Graphical methods based on the analysis of differences between log cumulative hazard functions are considered for a two-group semi-proportional hazard model which allows for interaction between treatments and covariates. Confidence procedures and test statistics that can be used to test for interaction and for main effects are developed. Their use is illustrated by applying them to the analysis...

Evaluating the risk of stroke is important in reducing the incidence of this devastating disease. Here, we apply Bayesian model averaging to variable selection in Cox proportional hazard models in the context of the Cardiovascular Health Study, a comprehensive investigation into the risk factors for stroke. We introduce a technique based on the leaps and bounds algorithm which e ciently locates...

Pandemi berdampak pada segala aspek kehidupan, salah satunya yaitu perekonomian yang mana mampu mempengaruhi keputusan investor dalam berinvestasi di pasar modal atau Bursa Efek Indonesia (BEI). Terdapat banyak indeks saham BEI, LQ45. Indeks LQ45 merupakan kumpulan 45 emiten terbaik dengan likuiditas tinggi dan kapitalisasi besar serta fundamental perusahaan baik. Fundamental ini mengacu perfor...