Chunk #12 — Less-is-more approaches

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Less is more, except when less is less: Studying joint effects.

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Under the null that the joint effect of A together with B is simply multiplicative, this parameter is 1. Algebraically, it can be reexpressed as follows: Pr[A,B|D]Pr[A¯,B¯|D]Pr[A¯,B|D]Pr[A,B¯|D]Pr[A,B]Pr[A¯,B¯]Pr[A¯,B]Pr[A,B¯]