A NEW PERSPECTIVE ON INDUSTRY R&D AND MARKET STRUCTURE*
基于Dorfman-Steiner模型构建产业研发模型，发现市场集中度与研发强度的关系取决于研发成果的市场份额占有能力，并用韩国制造业数据验证了不同占有能力下的正相关或倒U型关系。
This paper aims to shed some new insights on the long-debated and both extensively and intensively explored relationship between market concentration and industry R&D intensity. In order to do so, this study develops, from a classic Dorfman-Steiner [1954] model of firm R&D, a model of industry R&D, where consumer preference over quality and price, R&D technology, and the joint distribution of firm-specific technological competence and market share jointly determine the level of industry R&D intensity. The joint distribution term, which reflects both the underlying distribution of firms-specific technological competence and the strength of its link with market share, suggests that the concentration-R&D relationship differs depending on the strength of the link or simply the appropriability of R&D in terms of market share: A positive relationship is predicted for low-appropriability industries, where market concentration supplements low R&D appropriability, while a negative or an inverted U-shaped relationship for high-appropriability industries. An empirical analysis of data, disaggregated at the five-digit SIC level, on R&D and market concentration of Korean manufacturing industries provides supportive evidence for the predictions.