It is also (maybe implicitly) claiming that the three properties mentioned completely specify a good impact measure.
I don’t know that I’d claim that these completely specify a good impact measure, but I’d imagine most impact measures satisfying these properties are good (i.e. natural curves fit to those three points end up pretty good, I think).
I don’t know that I’d claim that these completely specify a good impact measure, but I’d imagine most impact measures satisfying these properties are good (i.e. natural curves fit to those three points end up pretty good, I think).