P.S. One of my friends brings up a good point to me that ideally you want dollar-weighted attrition, where you look at the total amount of money donated in year N divided by the total amount of money pledged in year N-1 for year N. It’s possible this number could be above 100% if people underestimate how much they’ll donate.
P.P.S. Though for understanding a model of how GWWC members come and go, regular attrition is the preferred metric, though you may want to have a slight bias towards looking at employed members.
P.S. One of my friends brings up a good point to me that ideally you want dollar-weighted attrition, where you look at the total amount of money donated in year N divided by the total amount of money pledged in year N-1 for year N. It’s possible this number could be above 100% if people underestimate how much they’ll donate.
P.P.S. Though for understanding a model of how GWWC members come and go, regular attrition is the preferred metric, though you may want to have a slight bias towards looking at employed members.