RSSNI - Talk on Wednesday, February 21st, 2024 at 1pm GMT

Date: Wednesday 21 February 2024, 12.50PM
Location: QUB in-person and online with MS Teams
Links to Teams and QUB in the body of text
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This is RSSNI's second talk in 2024
RSSNI - Talk on Wednesday, February 21st, 2024 at 1pm GMT
Dear Fellows

I am delighted to alert you to our second talk of 2024 on heterogeneous treatment effects in RCTs by Brieuc Lehmann of University College London. This will be a hybrid event using MS Teams software (link) with the speaker on-line and an in-person audience in Room 017 on the second floor of the Peter Froggatt Centre  in the main quadrangle, QUB (link).
Fusing experimental and observational data with multi-task Gaussian processes to estimate heterogeneous treatment effects
Randomised control trials (RCT) are widely considered the gold standard for making causal predictions and assessing treatment effects, due to the internal validity guaranteed from randomisation. However, the strict eligibility criteria lead to small samples not representative of the target population and as a result to lack of external validity. In contrast, observational studies, which typically come in larger sample sizes, are often more representative of the target population, but lack internal validity due to confounding leading to biased results. In this talk, I will present a Bayesian non-parametric approach to obtain estimates of heterogeneous treatment effects for the target population. Our approach is based on multi-output Gaussian Processes, where the limited RCT observations are used to correct the confounding effect on the observational data.

All welcome (including non-Fellows).

Previously recorded RSSNI talks here.
RSSNI talk write-ups here

Gilbert MacKenzie
Hon. Sec (Meetings) and
Felicity Lamrock
Meetings Host
Dr. Brieuc Lehmann  UCL, London, UK
Gilbert MacKenzie