[saghm]

Fair enough, I wasn't precise. There isn't one single objective way to do this math because, as you point out, different assumptions will lead to different results, and it makes it impossible to do neutrally. My reaction to the parent comment was mostly due to the rigid view that the way things work now is inherently right and proper rather than there being any number of plausibly defensible allocations of credit (and therefore the value generated), and I think many of them are probably a lot more defensible than what we have now.