Looking at some Dutching methods and I wondered how you would go about analysing results that include apprentices. It's not like a single selection per race system where you can look at simply whether the jockey on the selection was an (A) or not. I thought of simply indicating if the selection system failed were any or all the jockeys (A) but that doesn't really work as it may punish the system unfairly.

How do others view apprentice jockeys in their analysis or selection systems? Interested to hear some opinions.

Cheers.