There is a big, big, big problem when comparing degrees: People with PhD's are older and therefore have more experience. Everything in this entire chart could t

There is a big, big, big problem when comparing degrees: People with PhD's are older and therefore have more experience. Everything in this entire chart could theoretically be attributed entirely to experience and not education. Of course, it could also all be education, but as they say, Correlation does not imply Causation.