Adam Smith Business School

Dr Nadja van 't Hoff, University of Southern Denmark (SDU)

"Limited Monotonicity and the Combined Compliers LATE"
Friday, 28 February 2025. 15:00-16:30
Room 386AB, Adam Smith Business School Building

Abstract

We consider endogenous binary treatment with multiple binary instruments. We propose a novel limited monotonicity (LiM) assumption that is generally weaker than alternative monotonicity assumptions in the literature. We define and identify (under LiM) the combined compliers local average treatment effect (CC-LATE), which is arguably a more policy-relevant parameter than the weighted average of LATEs identified by two-stage least squares (TSLS), and is valid under more general conditions. Estimating the CC-LATE is trivial, equivalent to running TSLS with one constructed instrument on a subsample. We use our CC-LATE to empirically assess how knowledge of HIV status influences protective behaviors.

Bio

I am an Assistant Professor at the Econometrics and Data Science group at the Department of Economics, University of Southern Denmark. My interests are within the field of microeconometrics, specifically causal inference and causal machine learning, especially the methods for identifying and estimating causal effects in case of many instrumental variables. I am also interested in the empirical application of these methods within health and development economics to evaluate policy interventions using observational data.

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First published: 26 February 2025