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stat.ME2026
Treatment Effect Modification by Latent Classes
Hui Lan, Nathan Kallus, Winston Chou
Many treatments have effects that plausibly vary by latent classes. For example, the effect of personalized video recommendations may be stronger for users who seek a new discovery…
stat.ME2026
Policy Learning with Weak Signals
Benedikt Koch, Winston Chou, Aurélien Bibaut +1
Policy learning in digital experimentation faces three challenges: weak signal-to-noise ratios, rich covariate spaces, and massive data volumes. We formalize this regime by modelin…
stat.ME2026
Blending Proxy Metrics with a North Star
Winston Chou
Proxy metrics are widely used to improve the precision and velocity of online experimentation (aka A/B testing). Although proxies are often motivated by long-term outcomes that the…