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BSU Seminar: “Building Representative Matched Samples with Multi-valued Treatments in Large Observational Studies”

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If you have a question about this talk, please contact Alison Quenault .

In observational studies of causal effects, matching methods are widely used to approximate the ideal study that would be conducted under controlled experimentation. In this talk, I will discuss new matching methods that use tools from modern optimization to overcome five limitations of standard matching approaches. In particular, these new matching methods (i) directly obtain flexible forms of covariate balance, as specified before matching by the investigator; (ii) produce self-weighting matched samples that are representative of target populations by design; and (iii) handle multi-valued treatments without resorting to a generalization of the propensity score. (iv) These methods can handle large data sets quickly. (v) Unlike standard matching approaches, with these new matching methods, usual estimators are root-n consistent under usual conditions. I will discuss connections between matching and weighting. I will illustrate the performance of these methods in a case study about the impact of a natural disaster on educational opportunity.

This talk is part of the MRC Biostatistics Unit Seminars series.

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