NORTH-SOUTH TRADE WITH MULTINATIONAL FIRMS AND INCREASING PRODUCT VARIETY*
构建了一个包含跨国公司和产品种类增加的南北贸易模型，发现南方加强知识产权保护会促使跨国公司增加研发投入、加快技术转移，并提升南北双方的长期消费者福利。
We present a model of North–South trade with multinational firms and increasing product variety. Firms engage in innovative R&D to develop new product varieties in the North, and foreign affiliates of multinational firms engage in adaptive R&D to learn how to produce product varieties in the South. We find that a shift to stronger protection of intellectual property rights in the South induces foreign affiliates of multinational firms to increase their R&D expenditures, results in a faster rate of technology transfer within multinational firms, and increases long-run consumer welfare in both regions.