| Abstract | Relevant Market Definition is the key issue in antitrust area. The paper reviews the methods of defining relevant market systematically from economic perspective, and classifies them into three groups: (1) the methods which are used in many early cases, including the idea of cross-elasticities of demand, “reasonable interchangeability” test, “peculiar characteristics and uses” test and cluster markets etc; (2) HMT and its implementing methods, including critical loss analysis, critical elasticity analysis, diversion rate analysis, residual demand analysis and opportunity cost method; (3) the methods which are based on arbitrage theory, including price correlation test and shipment test. The paper has two purposes: one is helping parties concerned understand and use these methods properly; the other is improving Guidelines on Relevant Market Definition. |