I am a medical doctor and statistician, and an Associate Professor of Statistics at EPFL. I hold the Chair of Biostatistics since 2020 and I serve as Director of the Doctoral School in Mathematics since 2025. I work on causal inference and statistical methodology. My aim is to develop methods for longitudinal data, including time to event outcomes, that target scientifically meaningful questions under assumptions that are transparent and testable.

Much of my research clarifies the causal interpretation of classical survival analyses and advances the theory of separable effects, a class of causal parameters that disentangle direct and indirect effects of treatments. While working on these problems, I also became interested in questions about mechanisms, often branded more broadly as mediation analysis, and in how to make methodological results of practical interest. This line of work has been recognized with the Arthur Linder Prize (2023), the Lambert Award (2023), and the Sverdrup Prize (2024). Some relevant articles are:

Another line of research studies optimal decision making and precision medicine. I develop statistical theory for dynamic treatment regimes, including regimes that can outperform human experts and existing algorithms under explicit assumptions, and I work on formal definitions of harm and their implications for safe and value aligned decision systems. Some relevant articles are:

I also work on causal inference when conventional statistical assumptions fail, for example under interference in infectious disease and vaccine studies. My recent work includes methods to identify and estimate vaccine effects when exposure is unmeasured, to separate immunologic and behavioral effects, and to quantify vaccine waning. This research is part of my SNSF Starting Grant on infectious diseases and an SNSF Project Grant on causal inference under resource constraints. Some relevant articles are:

A fourth line of work studies practical problems in medicine and epidemiology, broadly speaking, including large scale applications. For example, I have been the senior author on large studies on the effect of treatments against breast cancer. I also actively engage in methodology for epidemiologists, providing theoretical arguments that justify different empirical strategies and developing new ones when needed. Some relevant publications are:

An updated list of my publications is found on Google scholar.