R code for a simulation study of an emprical Bayes analysis of a normal mean. Hiance A, Chevret S, Levy V (2009). A practical approach for eliciting expert prior beliefs about cancer survival in phase III randomized trial. Journal of Clinical Epidemiology, 62, 431-437. Gelman A (2006).

How vague is vague? A simulation study of the impact of the use of vague prior distributions in MCMC using WinBUGS Article in Statistics in Medicine 24(15):2401-28 · August 2005 with 308 Reads

A simulation study of the impact of the use of vague prior distributions in MCMC using WinBUGS. ... increases in computing power and the introduction of powerful software such as WinBUGS. This has enabled increasingly complex models to be fitted. ... Statistics in Medicine, 34, 7, (1097-1116), (2014).

Bayesian modeling using WinBUGS. ... through a simulation study. As expected, the proposed model presented better accuracy and precision in the estimations of prevalence, sensitivity and ...

We have conducted a simulation study comparing the effects of 13 different prior distributions for the scale parameter on simulated random effects meta-analysis data. We varied the number of studies (5, 10 and 30) and compared three different between-study variances to give nine different simulation scenarios.

8/1/2013 · In our simulation study for the three-level logistic model, which clearly demonstrated differences between estimation methods and statistical packages, SAS GLIMMIX Laplace and SuperMix AGQ performed better than other packages and estimation methods considering the criteria in and the convergence rate. The estimates obtained by HLM Laplace 6 and ...

10/27/2014 · This feature is not available right now. Please try again later.

A Simulation Study of a Bayesian Hierarchical Changepoint Model with Covariates Wonsuk Yoo(1), Elizabeth H. Slate(2) (1) Department of Mathematical Sciences New Jersey Institute of Technology Newark, NJ 07102 (2) Department of Biostatistics, Bioinformatics and Epidemiology

A Latent Mixture Approach to Modeling Zero-Inflated Bivariate Ordinal Data by Rajendra Prasad Kadel A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy Department of Epidemiology and Biostatistics College of Public Health University of South Florida Major professor: Getachew A. Dagne, Ph.D.

2.3 Simulation study. As the truth is known, simulation studies allow one to assess model performance relative to this known truth . This is in contrast to a case study, like the one in which we initially proposed model II, where the truth is not known.

Bayesian hierarchical models for misaligned data: a simulation study In this paper, the problem of combining information from different data sources is considered. We focus our attention on spatially misaligned data, where available information (typically counts or rates from administrative sources) refers to spatial units that are different ...

ASSESSING FIT OF ITEM RESPONSE MODELS FOR PERFORMANCE ASSESSMENTS USING BAYESIAN ANALYSIS . by . Xiaowen Zhu. B.S., Southwest University of Science and Technology, 1996 . Submitted to the Graduate Faculty of . School of Education in partial fulfillment . of the requirements for the degree of . Doctor of Philosophy . University of Pittsburgh . 2009

The SAS codes used in this study are easily extended to accommodate many other models with only slight modiﬁcation. This ... Although WinBUGS can be used as menu-driving software, we present a ... Monte Carlo simulation studies. This procedure is demonstrated in the following sections.

A third example is also provided to demonstrate how to iteratively run WinBUGS inside SAS for Monte Carlo simulation studies. The SAS codes used in this study are easily extended to accommodate many other models with only slight modification.

Comparing INLA and OpenBUGS for hierarchical Poisson modeling in disease mapping. ... and through altering these default settings in our simulation study, we were able to recover estimates comparable to those produced in OpenBUGS under the same assumptions. ... we build these models in both INLA and WinBUGS to assess the two packages ...

Bayesian Population Analysis using WinBUGS/OpenBUGS - a hierarchical perspective. Academic Press. This is the complete table of contents of a book that Michael Schaub and I have just written and that Academic Press will publish in December 2011. The book is very much a sequel to my

The computation was done using WinBUGS software and R-project environment with R2WinBUGS package, which control the simulations in WinBUGS, and coda package, which allows performing the analysis of simulation results. In the paper sample code in R-project that can be used as a pattern for further similar applications was also presented.

10.4 Application: Kidney disease study 252. 10.5 Simulation studies 259. 10.5.1 Simulation study of estimation 259. 10.5.2 Simulation study of model comparison 262. 10.5.3 Obtaining the Lν-measure via WinBUGS and R2WinBUGS 264. 10.6 Discussion 265. Appendix 10.1: Conditional distributions for parametric components 267

Both Choy’s and Wang’s approaches, being the extension of the formulation of the normal SVL model proposed by Meyer and Yu (2000), allow Bayesian analysis of the Student-t SVL models to be easily implemented using the WinBUGS software. A simulation study confirms that both Choy’s and Wang’s approaches give very close and sensible ...

Introduction to WinBUGS for Ecologists introduces applied Bayesian modeling to ecologists using the highly acclaimed, free WinBUGS software. It offers an understanding of statistical models as abstract representations of the various processes that give rise to a data set.

FW8051 Statistical Modeling of Ecological Data using R and WinBugs/JAGS Professor Dr. John Fieberg, ... (using WinBugs/JAGs). Use simulation methods to test their understanding and evaluate power and robustness of ... of real data or a simulation study to assess …

COMPARISON BASED ON SIMULATION STUDY AND 25 NDA DATASETS Ohidul Siddiqui, H. M. James Hung, and Robert O’Neill Ofﬁce of Biostatistics, Ofﬁce of Translational Sciences, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland, USA In recent years, the use of the last observation carried forward (LOCF ...

3/25/2018 · Complex PK/PD models, such as those described here, are difficult to encode in WinBUGS. WHAT QUESTION DID THIS STUDY ADDRESS? ☑ We aim to integrate WinBUGS into the DDMoRe IOF, using its interoperable standard languages, and demonstrate its application in an advanced real‐world case study. WHAT DOES THIS STUDY ADD TO OUR KNOWLEDGE?

Finally, the third case study involves the use of state-space models of wildlife population dynamics to make inferences about density dependence in a North American duck species. Reversible Jump MCMC is used to calculate the probability of various candidate models. For all examples, data and WinBUGS code are provided.

Using WinBUGS to Cox Model with Changing from the Baseline Hazard Function Ayman A. Mostafa and Anis Ben Ghorbal ... alive at the end of the study or analysis so the event of interest, namely death, has not occurred. ... model are now possible using simulation, techniques. The Gibbs sampler may be one of the best known Markov chain Monte Carlo

Unlike most of the current Markov chain Monte Carlo methods that ignore the previous trials, using a new algorithm the Markov chain Monte Carlo algorithm is able to use the previous steps and generate the next candidate. This training-based algorithm is able to speed-up the Markov chain Monte Carlo algorithm by an order of magnitude.

Bayesian hierarchical models have been proposed to combine evidence from different types of study designs. However, when combining evidence from randomised and non-randomised controlled studies, imbalances in patient characteristics between study arms may bias the results. The objective of this ...

9/29/2014 · The user should then open the file and save it using a study-specific name. Within NetMetaXL, the user will see a WinBUGS menu bar in the top right of Microsoft Excel. WinBUGS is a software for conducting Bayesian analysis using Markov chain Monte Carlo simulation .

246 10 Introduction to Bayesian Analysis using WinBUGS Figure 10.5. Polling Example WinBUGS screenshot 10.3 Reaction Time Example, Pooled Two Sample T-test One way to study how the human brain performs various tasks is to measure the lengths of time required to …