I think that filtering is only one of many important factors, many of which are interrelated. An elite school's imprimatur, for example, can more easily convinc

I think that filtering is only one of many important factors, many of which are interrelated. An elite school's imprimatur, for example, can more easily convince clients and even internal management of an employee's competence. Filtering alone doesn't explain why those companies go 50% deep into the pool of Harvard graduates before considering the top 5% of UCLA grads.