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  1. S

    Trick question

    The following question was posed to me : A person wants to compare between 2 versions of algorithms. He knows he has 100 False Negatives and wants the algorithms to find them. version 1 found 40 out of 100 False Negatives. version 2 found 90 out of 100 False Negatives. Is ver2 better?
  2. S

    Difference in differences estimation using a regression

    Hello, Difference in difference estimation implies calculating (P2-P1)-(S2-S1). That would give the result of the treatment. It seems to me that the estimation is valid for a specific time point, time 2 at this example. I have read however (for example, at wikipedia), that DiD estimation can...