I read studies (seriously, it’s super time-consuming!) and consider the best evidence available. Because of the lag introduced by studies, sometimes hearsay is enough to put in a guesstimate. It’s interesting to play around with the values, however, and see what magnitude change in a single one would lead to a change in the ultimate decision. Sometimes you find out it doesn’t make a difference, and more precise information would be irrelevant, so you can move on.
I read studies (seriously, it’s super time-consuming!) and consider the best evidence available. Because of the lag introduced by studies, sometimes hearsay is enough to put in a guesstimate. It’s interesting to play around with the values, however, and see what magnitude change in a single one would lead to a change in the ultimate decision. Sometimes you find out it doesn’t make a difference, and more precise information would be irrelevant, so you can move on.