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Ethan Ashby / Research Website

Biostatistics PhD Student, University of Washington

ethanashby.github.ioRSS feed ↗3 posts

Latest posts

New preprint on arXiv!

My paper, “Improving the efficiency of infectious disease prevention trials using negative control outcome event times”, is now available on arXiv. We investigate how adjusting for negative control infection times can improve the efficiency of prevention efficacy estimates against a target infection time through overlapping exposure mechanisms. The work draws heavily on semiparametric theory for…

Time-varying VE Paper wins ASA Early in Career Award

My paper, “Debiasing hazard-based, time-varying vaccine effects using vaccine-irrelevant infections: An observational extension of a pivotal Phase 3 COVID-19 vaccine efficacy trial”, was selected as an Early in Career Paper Award Winner by the American Statistical Association (ASA) in 2026. Many thanks to all my collaborators, and I am excited to attend the JSM meeting in August 2026 to present my…

Time-varying VE paper wins Student Distinguished Paper Award at ENAR

My paper, “Debiasing hazard-based, time-varying vaccine effects using vaccine-irrelevant infections: An observational extension of a pivotal Phase 3 COVID-19 vaccine efficacy trial”, was selected as a Distinguished Student Paper Award Winner by the Eastern North American Region (ENAR) of the International Biometrics Society (IBS) in 2026. Many thanks to all my collaborators, and I am excited to…