The book explores how patent assertion entities, also known as patent trolls, negatively affect competition and the economy.

1. Introduction D. Daniel Sokol; 2. Missing the forest for the trolls Mark A. Lemley and A. Douglas Melamed; 3. Empirical evidence on the behavior and impact of patent trolls: a survey Lauren Cohen, Umit G. Gurun and Scott Duke Kominers; 4. Assertion of standard-essential patents by non-practicing entities Jorge L. Contreras; 5. Patent privateering: the rise of the hybrid patent assertion entities D. Daniel Sokol; 6. Regulating patent assertions Paul R. Gugliuzza; 7. Patent assertion entities in Europe Brian J. Love, Christian Helmers, Fabian Gaessler and Max Ernicke; 8. Treatment of PAEs (patent-assertion entities) under Korean antitrust law Haksoo Ko and Jeong Seo; 9. Patent assertion entities issues in China Meng Yanbei; 10. Patent assertion entities and competition law in Japan Tadashi Shiraishi; 11. Patent assertion entities in merger review in Taiwan: issues of characterization and remedies Andy C. M. Chen.