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matheusfacure / python-causality-handbook

Causal Inference for the Brave and True. A light-hearted yet rigorous approach to learning about impact estimation and causality.
https://matheusfacure.github.io/python-causality-handbook/landing-page.html
MIT License
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Minor correction and suggestion for chapter 9 #351

Open TomaszZamacinski opened 1 year ago

TomaszZamacinski commented 1 year ago

There is an issue on chapter 9, in the following paragraph:

We also rewrite potential outcomes with a double indexing notation, where the first index denotes the counterfactual for the instrument and the second index, for the treatment

It should be:

We also rewrite potential outcomes with a double indexing notation, where the first index denotes the counterfactual for the treatment and the second index, for the instrument

On a different note, since IV2SLS.from_formula is being used for OLS estimation in this chapter I think it would be beneficial to explicitly state that OLS is a special case of IV2SLS.