, 3 tweets, 3 min read Read on Twitter
Edward Simpson, of Simpson's paradox, died last month at age 96.
telegraph.co.uk/obituaries/201…

Like all of us, I was taught #SimpsonsParadox by people who had not read what Simpson wrote:
jstor.org/stable/2984065

Then I read Simpson's paper and realized all the books were incorrect.
Simpson's example illustrates the distinction between confounders and colliders, but...

in 1972, Blyth failed to grasp the causal structure of Simpson's example and misrepresented it as confounding
jstor.org/stable/2284382

Most people read Blyth only, which perpetuated the error
So chances are that the #SimpsonsParadox you were taught is plain, extreme confounding

(all those cool graphs you have seen for Simpson's paradox just describe extreme #confounding)

when in reality Simpson's example is way more interesting.

More here
👇
academic.oup.com/ije/article/40…
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