Is Selecting First P of Model ListProfitable ?
Let P (0-1) be the selected fraction of model list, sorted by model score.
Selection size = NP
target density is TP = T • Lift(P)
Profit(P) = NP (T • Lift(P) B - C )
positive if T • Lift(P) B > C , or
C 1
Lift(P) > ------ = ---
T ·B K
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