This document discusses monopolies and provides examples related to Vietnam's state-owned electricity company EVN. It begins by defining monopoly and describing key features such as single seller, no competition, price maker. It then discusses types of monopoly including natural, geographic, technological, and government. The document provides details on EVN's monopoly power in Vietnam, including that it owns all production materials and controls the entire electricity process. It also discusses EVN's revenues, prices, demand curve, and long-term investment plans.