Reverse regression

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Reverse regression refers to a problem in statistical inference where a conclusion is reversed depending on the variable being adjusted.

The example given by Pearl is that of salary discrimination: comparing the salaries of equally qualified men and women, we see that men earned a higher salary, but comparing the qualifications of equally paid men and women, we see that men are more qualified (p. 426).[1]

There is some discussion of this on LessWrong.[2]

Relation to Simpson's paradox is discussed in

Also see


Judea Pearl says the "controversy" "occupied the social science literature in the 1970s".[1]


  1. 1.0 1.1 Judea Pearl. "Epilogue: The Art and Science of Cause and Effect" in Causality: Models, Reasoning, and Inference. 2nd ed. Cambridge University Press. 2009.