18 citations · 70 across the 6 of their papers we have counts for
6 papers
A Likelihood Perspective on Dose-Finding Study Designs in Oncology
Zhiwei Zhang
Dose-finding studies in oncology often include an up-and-down dose transition rule that assigns a dose to each cohort of patients based on accumulating data on dose-limiting toxici…
A two-state mixed hidden Markov model for risky teenage driving behavior
John C. Jackson, Paul S. Albert, Zhiwei Zhang
This paper proposes a joint model for longitudinal binary and count outcomes. We apply the model to a unique longitudinal study of teen driving where risky driving behavior and the…
The use of covariates and random effects in evaluating predictive biomarkers under a potential outcome framework
Zhiwei Zhang, Lei Nie, Guoxing Soon +1
Predictive or treatment selection biomarkers are usually evaluated in a subgroup or regression analysis with focus on the treatment-by-marker interaction. Under a potential outcome…
Likelihood reweighting methods to reduce potential bias in noninferiority trials which rely on historical data to make inference
Lei Nie, Zhiwei Zhang, Daniel Rubin +1
It is generally believed that bias is minimized in well-controlled randomized clinical trials. However, bias can arise in active controlled noninferiority trials because the infere…
Marginal analysis of longitudinal count data in long sequences: Methods and applications to a driving study
Zhiwei Zhang, Paul S. Albert, Bruce Simons-Morton
Most of the available methods for longitudinal data analysis are designed and validated for the situation where the number of subjects is large and the number of observations per s…
A Law of Likelihood for Composite Hypotheses
Zhiwei Zhang
The law of likelihood underlies a general framework, known as the likelihood paradigm, for representing and interpreting statistical evidence. As stated, the law applies only to si…