Another thing that this does not measure is philanthropic effectiveness. If there are lessons to be learned in terms of what kinds of philanthropy works better than others, then those learnings may cause other philanthropic endeavors to have greater success. I've had a bit of experience working with several big foundations and seeking out effective ways to spend lots of money is an extremely hard problem and they're all aware of it, and they treat each investment as an experiment.

Of course, the effectiveness of each type of investment is not fixed, and will inevitably drop off. I believe the whole 'just buy malaria nets' first-order thinking was part of discourse for a while before people wised up.