I'm currently tooling on G. W. Imbens, D. B. Rubin, *Causal Inference for Statistics, Social, and Biomedical Sciences*, Cambridge, 2015. I am enthusiastic about using causal inference and tools like *propensity scores* for scientific purposes, as I noted in a comment at Ewan's blog post, "[Code for causal inference: Interested in astronomical applications](https://astrostatistics.wordpress.com/2020/01/23/code-for-causal-inference-interested-in-astronomical-applications/)".