Here you can see the average purses per track including minimum and maximum values for ALW races :
https://github.com/deltalover/hoplat...ies/purses.csv
A meaningful way to use this information might be to use shippers who performed similarly (from - to track) and create pairs of purse differences and possibly build a metric to neutralize the difference in purses.
Still, I am not convinced that this exercise worths the effort since a good set of speed figures will probably tell us the story in a better and easier to use way.