Jeff Bezos, founder and chief executive officer of Amazon.com Inc., speaks during a discussion at the Air Force Association’s Air, Space and Cyber Conference in National Harbor, Maryland, U.S. (Photographer: Andrew Harrer/Bloomberg)

Bezos Disputes Amazon’s Market Power. But His Merchants Feel the Pinch

(Bloomberg) -- Fifteen years ago, Jason Boyce made a bet on Amazon that changed his life for the better. He started selling basketball hoops on the site—known mostly for books at the time—and his s...