Publications

Novel Stratification and Matching Methods in Observational Studies
When randomized control trials are infeasible, we rely on observational studies to determine causal effects of treatments. The control …
Katherine Brumberg
Book
A New Design for Observational Studies Applied to the Study of the Effects of High School Football on Cognition Late in Life
Do the impacts that occur when playing high school football have concussive effects that accelerate cognitive decline late in life? We …
Katherine Brumberg, Dylan S. Small, Paul R. Rosenbaum
Code
Optimal Refinement of Strata to Balance Covariates
What is the best way to split one stratum into two to maximally reduce the within-stratum imbalance in many covariates? We formulate …
Katherine Brumberg, Dylan S. Small, Paul R. Rosenbaum
Code DOI
Protocol for an Observational Study of the Effects of High School Football on Cognition Late in Life Using a New Matching Method
A study in JAMA Neurology of the effect of high school football exposure on cognition at age 72 did not detect a significant effect. …
Katherine Brumberg, Dylan S. Small, Paul R. Rosenbaum
DOI
Introductory Statistics for Data Analysis
This book describes the probability theory associated with frequently used statistical procedures and the relation between probability …
Warren Ewens, Katherine Brumberg
Book Errata
Using Natural Strata When Examining Unmeasured Biases in an Observational Study of Neurological Side Effects of Antibiotics
Fluoroquinolones are widely prescribed antibiotics that carry a US Food and Drug Administration warning about possible side-effects on …
Katherine Brumberg, Darcy E. Ellis, Dylan S. Small, Sean Hennessy, Paul R. Rosenbaum
Code DOI
Using Randomized Rounding of Linear Programs to Obtain Unweighted Natural Strata That Balance Many Covariates
In causal inference, natural strata are a new compromise between conventional strata and matching in a fixed ratio, say pair matching …
Katherine Brumberg, Dylan S. Small, Paul R. Rosenbaum
Code DOI
Differential Gene Expression in Prostate Tissue
In a prospective study of 31 925 men with 18 yr of follow-up, higher ejaculation frequency (EF) throughout adulthood was associated …
Jennifer A. Sinnott, Katherine Brumberg, Kathryn M. Wilson, Ericka M. Ebot, Edward L. Giovannucci, Lorelei A. Mucci, Jennifer R. Rider
DOI