LAUSR

In this discussion we consider why it is important to estimate causal effect parameters well even they are not identified, propose a partially identified approach for causal inference in the presence of colliders, point out an under-appreciated advantage of double robustness, discuss the relative difficulty of independence testing versus regression, and finally commend H\"aggstr\"om for her exploration of causal inference with high-dimensional confounding, while making a call for further research in this same vein.