This Article analyzes the secondary market for patent rights. It defines a patent troll as a participant in this market that does not contribute to the social goal the patent system was meant to serve: technological innovation. The legitimate secondary market, in which patent rights are bought...

In many industries, the arc of our contemporary economy bends towards bigness. The now-ubiquitous digital platform companies such as Amazon, Facebook, and Netflix and (in China) Baidu, Tencent, and Alibaba are the best-known examples. While some concerned onlookers propose structural remedies,...