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DTSTART:19960101T000000 END:STANDARD BEGIN:STANDARD TZNAME:GMT TZOFFSETFROM:+0100 TZOFFSETTO:+0000 DTSTART:19961027T020000 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20260501T123906Z DTSTART;VALUE=DATE-TIME:20241015T140000 DTEND;VALUE=DATE-TIME:20241015T150000 SUMMARY:CS Colloquium + Foundations of AI Seminar: Arthur Gretton (UCL) TZID:Europe/London UID:20241015-8a17841b9198c8bf01919da0cc7d0636@warwick.ac.uk CREATED:20240829T101815Z DESCRIPTION:Title: Causal Effect Estimation with Context and Confounders Abstract: A fundamental causal modelling task is to predict the effect o f an intervention (or treatment) on an outcome\, given context/covariate s. Examples include predicting the effect of a medical treatment on pati ent health given patient symptoms and demographic information\, or predi cting the effect of ticket pricing on airline sales given seasonal fluct uations in demand. The problem becomes especially challenging when the t reatment and context are complex (for instance\, "treatment" might be a web ad design or a radiotherapy plan)\, and when only observational data is available (i.e.\, we have access to historical data\, but cannot int ervene ourselves). The challenge is greater still when the covariates ar e not observed\, and constitute a hidden source of confounding. I will g ive an overview of some practical tools and methods for estimating causa l effects of complex\, high dimensional treatments from observational da ta. The approach is based on conditional feature means\, which represent conditional expectations of relevant model features. These features can be deep neural nets (adaptive\, finite dimensional\, learned from data) \, or kernel features (fixed\, infinite dimensional\, enforcing smoothne ss). When hidden confounding is present\, a neural net implementation of instrumental variable regression can be used to correct for this confou nding. The methods will be applied to modelling employment outcomes for the US Job Corps program for Disadvantaged Youth\, and in policy evaluat ion for reinforcement learning. Bio: Arthur Gretton is a Professor with the Gatsby Computational Neuroscience Unit\, and director of the Centre for Computational Statistics and Machine Learning (CSML) at UCL\; and a research scientist at Google Deepmind. His recent research interests inc lude causal inference and representation learning\, design and training of generative models\, and nonparametric hypothesis testing. Arthur has been an associate editor at IEEE Transactions on Pattern Analysis and Ma chine Intelligence\, an Action Editor for JMLR\, a Senior Area Chair for NeurIPS (2018\,2021) and ICML (2022)\, a member of the COLT Program Com mittee in 2013\, and a member of Royal Statistical Society Research Sect ion Committee since January 2020. Arthur was program co-chair for AISTAT S in 2016\, tutorials co-chair for ICML 2018\, workshops co-chair for IC ML 2019\, program co-chair for the Dali workshop in 2019\, and co-organs ier of the Machine Learning Summer School 2019 in London. See also https ://faiseminarswarwick.github.io/speakers/a-gretton.html LOCATION: CATEGORIES:FAIS Seminar,Computer Science Colloquium LAST-MODIFIED:20240829T101815Z ORGANIZER;CN=Markus Brill: END:VEVENT END:VCALENDAR