# Timeline for Potential outcomes selection bias

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Nov 29, 2021 at 15:31 comment I see. I just missed the algebraic trick. So, conversely we could do the trick with adding $E[Y(1) | D = 0] - E[Y(1) | D = 0]$, which would give $E[Y(1) - Y(0) | D = 0] + E[Y(1) | D = 0] - E[Y(1) | D = 1]$, basically the ATC + selection bias. Thanks a lot!
Nov 29, 2021 at 14:35 history answered