[shapefrog]

It is paywalled so I can not.

However, I was unaware that they already conducted said experiment. I am now left confused as to why they would not mention such in the abstract, and refer only to natural experiments and second order measurements.

I shall aquire the paper and learn why.

[tgv]

Using Google Scholar (1), you can find PDF versions of the paper

(1) https://scholar.google.com/scholar?cluster=16877003867074896...