https://youtu.be/aPm2dMD7FSE The standard theory of monopoly within the mainstream of the economics profession is that monopolies increase prices and reduce production levels compared to competitive industries. So I gathered historical economic data on prices and production for seventeen of the industries accused of monopolization during the congressional debates over the Sherman Act. Surprisingly, no other economist had apparently ever done this! What I found was that while real (inflation-adjusted) gross domestic product (GDP) increased by about 24 percent from 1880 to 1890, the industries...