Explore the second part of a comprehensive lecture on monopolies from MIT's Principles of Microeconomics course taught by Prof. Jonathan Gruber. Delve into crucial topics including the origins of monopolies, policy approaches to addressing monopoly power, and the concept of contestable markets. Gain valuable insights into market structures, natural monopolies, and their economic implications through this 47-minute video that builds upon previous monopoly discussions. Part of MIT OpenCourseWare's Fall 2023 microeconomics series, this lecture provides essential knowledge for understanding how monopolistic markets function and their broader economic impact.