In Roberts reply to my comment above, he mentioned I factor I thought was a 40-60% contributor, I'd say your observed factor is a contributor, and if I was aske

In Roberts reply to my comment above, he mentioned I factor I thought was a 40-60% contributor, I'd say your observed factor is a contributor, and if I was asked to assign a value I'd say between 10-30%. I should probably write a blog post/phd on this.