Participants in longitudinal studies on the effects of drug treatment and criminal justice system interventions are at high risk for institutionalization. Use of principal stratification to control for institutionalization at follow-up is evaluated.
Presents findings from a case study of different approaches to the treatment of missing data. Casewise deletion can perform less well than expected. Unsophisticated imputations, such as mean and conditional mean, performed better than expected.
Examines implications for statistical power of using predicted probabilities for a dichotomous variable rather than the actual variable. Information loss from not observing actual values can be large. Direct substitution is easy and efficient.
Compares the accuracy of a Bayesian approach to combining surname and geocoded information to estimate race/ethnicity to two indirect methods. The Bayesian Surname and Geocoding method is a substantial improvement over other methods.
Develop a statistically rigorous trauma mortality prediction model based on empiric estimates of severity for each injury in the abbreviated injury scale (AIS) and compare the performance of this new model with the injury severity score (ISS).
Proposes a pooled kappa estimator that efficiently summarizes interrater agreement by domain, as evaluated over 2,176 rated items. It is more widely applicable and makes better use of scarce subjects than simply averaging item-level kappas.
Develops a metric for revisions to subjective expectations and proposes a survey design strategy that enables the estimation of the metric. As an application, analyzes how women update expectations about the effectiveness of contraception methods.
Risks associated with less satisfying intimate relationships often co-occur within individuals. Relationship satisfaction was lower among those with more risks, and cumulative risk score was predictive above and beyond the individual risk factors.
Analyzes experimental survey data, with a random split into respondents who get an open-ended question and those immediately directed to unfolding brackets. Once yea-saying is taken into account, no evidence of anchoring at the entry point is found.
Classic work from 1961 discusses basic concepts of game theory and its applications for military, economic, and political problems, as well as its usefulness in decisionmaking in business, operations research, and behavioral science.
To provide the Air Force with a tool to better understand budgetary submissions, we develop several budget estimating relationships to explain why net sales of flying depot-level reparables are at historic levels.
We present a semi-automatic method of outlier detection for continuous, multivariate survey data that is designed to identify outlying cases and suggest potential errors on a case-by-case basis, in the presence of missing data.
If teachers and schools are to be held accountable for their students' performance, strategies for measuring the impact of their work must be refined, or the uncertainties of these measurements must be taken into account.