Even for societal aggregate worries it’s only worth using days as the denominator if the potential interventions you’re considering scale by days and not person-days. For example “stay-home on Halloween” or “move Halloween earlier” has costs proportional to the latter.
Even for societal aggregate worries it’s only worth using days as the denominator if the potential interventions you’re considering scale by days and not person-days. For example “stay-home on Halloween” or “move Halloween earlier” has costs proportional to the latter.