Was reading Buffet:The making of an American Capitalist. On visits to B-schools for giving guest lectures, he often plays a game with students so as to help them better understand his methodology in picking up the right stocks in the stock market.


The proposition he makes to the students is:
Given the guarantee that you would be entitled to 10% of any one of your classmates earnings for life, which of your classmates would you choose?

...obviously most of us wouldnt pick someone just based on a CGPA. A person's energy, intergrity, capability, etc would come into the picture. And these again cannot be quantified.

So while numbers, betas and alphas may help...Buffet would look beyond.