For clarification: (PITi+ui) is the “real” tractability and importance?
The text seems to make more sense that way, but reading “ui is the unknown (to you) importance and tractability of the cause.”, I interpreted it as ui being the “real” tractability and importance instead of just a noise term at first.
Yes, PITi + ui is supposed to be the real importance and tractability. If we knew PITi + ui, then we would know a cause area’s marginal impact exactly. But instead we only know PITi.
For clarification: (PITi+ui) is the “real” tractability and importance?
The text seems to make more sense that way, but reading “ui is the unknown (to you) importance and tractability of the cause.”, I interpreted it as ui being the “real” tractability and importance instead of just a noise term at first.
Yes, PITi + ui is supposed to be the real importance and tractability. If we knew PITi + ui, then we would know a cause area’s marginal impact exactly. But instead we only know PITi.