Economic Analysis of the Disputes of Intellectual Property Rights

本研究探讨企业在知识产权法律纠纷中所扮演的角色。知识产权，包括专利、商标、版权和其他权利，对促进发明创造活动起着重要作用。美国企业和发明者以日本企业侵犯其权利为由起诉日本企业，知识产权法律纠纷引起了广泛关注。由于日本企业严重依赖美国和欧洲的发明创造，这些争端对日本企业产生了重大影响。首先，本研究探讨了作为商业决策工具的“决策树模型”如何用于分析知识产权纠纷。研究结果发表在《知识产权决策分析——决策树分析的应用》（日文）上。其次，本研究分析了决策者的行为方面如何影响争议的风格和结果。我对电子公司从事知识产权工作的数百人进行了问卷调查。我发现行为方面对决策的影响很大。一篇论文目前正准备发表。第三，对知识产权价值及其与企业价值的关系进行了研究。通过以制药公司为样本，我研究了一家公司的价值是如何由知识产权决定的。我发现，在20世纪80年代末，高质量的专利提高了基于现金流的公司价值。这里使用的方法被证明适用于评估公司的无形资本。研究结果发表在《制药企业的企业价值与研发（日文）》等论文中。第四，尝试基于金融经济学中的CAPM和异常收益方法进行事件研究。由于数据的限制，我还没有成功完成这一部分。通过使用一些不同的数据库和方法，我打算进行这方面的研究。少

This study investigates the role of legal disputes of the firms over intellectual property rights. Intellectual property rights, including patent, trademark, copyright, and other rights, play the significant role to promote inventive activities. Legal disputes over intellectual property rights have achieved the wide attentions when U.S.firms and inventors sued Japanese firms with a complaint that Japanese firms infringe their rights. Because Japanese firms heavily depend on inventions made by U.S.and European, the disputes have significant impacts on Japanese firms.First, this study investigates how "the decision tree model, "which is widely used as a tool of business decision making, is used to analyze the disputes of intellectual property rights. The results are published as Decision Making Analysis of Intellectual Property Rights-Application of the Decision Tree Analysis (in Japanese).Second, this study analyzes how behavioral aspects of decision makers influence the style and resul … More ts of the disputes. I conduct questionnairc survey by using a sample of hundred some people who are working on the intellectual property rights in electronic firms. I find the strong impact of behavioral aspects on the decision making. A paper is currently prepared for a publication.Third, I conduct the research on the value of intellectual property rights and their relationship with the firm value. By using pharmaceutical firms as a sample, I examine how the value of a firm is determined by intellectual property rights. I find that patents of a good quality raise the cash flow based firm value in the late 1980s. The method used here is shown to be applied to value the intangible capital of a firm. The results are published in several papers including "Firm Value and R&D of Pharmaceutical Firms (in Japanese)."Fourth, I attempt to conduct an event study based on CAPM and abnormal returns method in financial economics. Due to the limit of data, I have not yet successfully completed this part. By using somewhat different data base and method, I plan to pursue of this line of research. Less