I'm just curious - can anyone lend any insight as to some of the things that are behind some of the PGA projections?

I mean - I'm not looking for all of the secrets to be given away. But I guess things like -

Is it totally empirical or is there some subjective input?

Is it based on last year's stats and/or rolling stats, or some other kind of metric?

Does it factor in vegas lines?

Probably some more, that I can't think of - but basic things like that, not necessarily giving away your entire recipe. What are the projections based on / how are they formulated?

Thanks,
Sean