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Statistical Analysis Methodology

Commentary
Taking an Interest: What Makes Someone Respond to a Survey
Researchers have two main reasons for caring about non-response. First, it is important to ensure that survey findings are unbiased and representative, and second, concern about survey non-response is a key reason given by those who ignore or chose not to act on the findings of research.
Jan 5, 2016
Journal Article
Robust Estimation of the Proportion of Treatment Effect Explained by Surrogate Marker Information
In randomized treatment studies where the primary outcome requires long follow-up of patients.
Dec 11, 2015
Journal Article
Beyond the Ecological Fallacy: Potential Problems When Studying Healthcare Organisations
Simple recommendations for statistical best practices will improve the translation of appropriate and robust research findings into healthcare policy and practice.
Oct 20, 2015
Commentary
How to Help Surveys Have More Impact
How can researchers and the users of survey research move from a knee-jerk dismissal of survey findings to being comfortable trusting and acting on the findings? Likely ways forward include emphasizing the methodology, triangulating the evidence, acknowledging the limitations, and developing good communication and trust between parties.
Oct 16, 2015
Tool
Toolkit for Weighting and Analysis of Nonequivalent Groups: A Tutorial on the TWANG Commands for Stata
This tutorial provides an introduction to TWANG and demonstrates its use through illustrative examples. This tool includes the TWANG commands for Stata, a tutorial on their use, and the sample code and datasets used in the tutorial.
Sep 18, 2015
Multimedia
TWANG Short Course/Educational Videos: Three Videos — Introduction, Propensity Score Weighted Analyses with 2 Groups, and Propensity Score Weighted Analyses with More Than 2 Groups
Videos with step-by-step procedures for implementing propensity score analyses involving two or more treatment groups using the TWANG (Toolkit for Weighting and Analysis of Nonequivalent Groups) data analysis package.
Jul 13, 2015
Journal Article
Web-based Textual Analysis of Free-Text Patient Experience Comments from a Survey in Primary Care
Open-ended questions eliciting free-text comments have been widely adopted in surveys of patient experience.
May 18, 2015
Commentary
Sensitivity Analyses: Shedding Unexpected Light on Results
Sensitivity analysis lets researchers test and explore some of the assumptions that underlie their findings. These might be assumptions about a relationship, data that's been excluded, or which part of an analysis is most important.
May 1, 2015
Tool
Propensity Scores for Multiple Treatments: A Tutorial for the MNPS Macro in the TWANG SAS Macros
This tutorial explains the syntax and features related to the implementation of the MNPS function in the SAS TWANG macros.
Mar 13, 2015
Journal Article
A Fruitful Application of Static Marginal Analysis
This paper describes the application of the technique of simple "marginal analysis" to an Air Force problem and suggests that a similar application may be useful in many industrial situations.
Feb 20, 2015
Journal Article
Causal Inference Using Mixture Models: A Word of Caution
Mixture models are useful for monitoring the behavior of data and for offering comparisons to supplemental data, especially in the presence of unobserved heterogeneity, but one should be highly cautious when drawing causal inferences as to which population each component of the fitted mixture model represents.
Aug 28, 2014
News Release
Economic Development Not the Only Influence on Personal Car Use
Although countries with high levels of economic development generally have more personal automobile travel than less-affluent nations, income is not the only factor that determines a nation's demand for cars.
Jul 18, 2014
Research Brief
Driving in the Future in Developing Countries
Automobility -- travel in personal vehicles -- varies between countries. This brief summarizes a study of the factors besides economic development that affect automobility and how automobility might evolve in developing countries.
Jul 15, 2014
Report
Exploring the Future of Driving in Developing Countries
The level of automobility, or travel in personal vehicles, varies among countries. By determining the factors besides economic development that have affected automobility in developed countries, researchers can predict how automobility might evolve in developing countries.
Jul 15, 2014
Tool
Toolkit for Weighting and Analysis of Nonequivalent Groups: A Tutorial for the TWANG SAS Macros
The Toolkit for Weighting and Analysis of Nonequivalent Groups, or TWANG, contains a set of functions to support causal modeling of observational data through the estimation and evaluation of propensity score weights.
Apr 18, 2014
Journal Article
Statistical Benchmarks for Health Care Provider Performance Assessment: A Comparison of Standard Approaches to a Hierarchical Bayesian Histogram-Based Method
Given the rewards and penalties associated with characterizing top performance, the ability of statistical benchmarks to summarize key features of the provider performance distribution should be examined.
Jan 1, 2014
Journal Article
Risk of Bias: A Simulation Study of Power to Detect Study-Level Moderator Effects in Meta-Analysis
Although study characteristics, such as trial quality, may explain some proportion of heterogeneity across study results in meta-analyses, residual heterogeneity is a crucial factor in determining when associations between moderator variables and effect sizes can be statistically detected.
Nov 1, 2013
Announcement
Susan Paddock Named Fellow of the American Statistical Association
The American Statistical Association named Susan Paddock as a 2013 ASA Fellow. She was honored for excellence in statistical applications to public policy research, for integrating innovative statistical methodology with substantive problems of national healthcare policy, and for noteworthy service to the profession.
Jul 1, 2013
Journal Article
A Tutorial on Propensity Score Estimation for Multiple Treatments Using Generalized Boosted Models
The use of propensity scores to control for pretreatment imbalances on observed variables in non-randomized or observational studies examining the causal effects of treatments or interventions has become widespread over the past decade.
Jan 1, 2013
Journal Article
Quantifying 'Problematic' DIF Within an IRT Framework: Application to a Cancer Stigma Index
This paper introduces two metrics for IRT DIF evaluation that can discern potentially problematic DIF among items flagged with statistically significant DIF.
Jan 1, 2013

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RAND Topic:
Statistical Analysis Methodology

Topic Synonyms:
Statistical Modeling