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It's transparently obvious from looking at data that getting a college degree is correlated with success, assuming success means having more income. The gulf is

• randomdata 15y ago
  But all that really tells is that there may be some correlation to the attributes of a person which allows them to make their way through increasingly challenging levels of education (smarts, drive, luck, etc.), also allows them success in business. It is more than likely those attributes were present before entering college. Perhaps even as far back as birth.