企业与合作伙伴的多元竞争关系对其战略选择和知识管理具有深远意义。本文以2012-2018年沪深两市医药制造业上市公司作为研究样本，实证研究了企业与合作伙伴技术竞争与产品竞争之间的关系，以及产业环境不确定性和企业技术商业化能力在其中的调节作用。研究结果表明，企业与合作伙伴的技术竞争与产品竞争之间呈倒U型关系，技术竞争强度增加并不必然导致产品竞争强度的增大；产业环境不确定性和企业技术商业化能力显著增强倒U型关系，稳定的产业环境能够缓和企业与合作伙伴在产品市场上的竞争，具有较强技术商业化能力的企业与合作伙伴在产品市场上的竞争更为激烈。

近20年来，中国企业创新活动陷入一个两难的困境，企业“不愿”甚至“不敢”进行创新活动。为改善创新的制度环境，2008年中国政府开始实施国家知识产权战略。本文旨在评估产权制度改革的实施效果。研究发现，第一，中国知识产权战略激励了企业的创新活动，能够保护企业创新。知识产权战略通过提高企业间知识侵权的违法成本来达到“保护创新”的目的，不过，行政保护和产权保护环境这两种保护机制很难对创新成果起到改善的作用。第二，中国知识产权战略并没有明显的改善创新质量，企业发明专利数量和新产品产值率均没有明显的提高。若长此以往，企业可能会陷入“不愿创新”的怪圈中，反过来亦会“伤害创新”。第三，相对于非高新技术企业，知识产权战略对高新技术企业的创新投入和创新质量的改善强度更大。需要注意的是，知识产权战略抑制了非高新技术企业的创新质量，也就是说，非高新技术企业干扰了中国知识产权战略的实施效果。那么，一方面中国政府应当继续实施知识产权战略，特别是重点落实知识产权争端的司法惩戒力度；另一方面，中国政府应当关注这一战略实施对非高新技术企业所带来的潜在影响。

知识产权司法保护赋予专利权人以“牙齿”，其是否能够促进中国企业进行自主创新，直接关系到中国企业的创新战略转型。本文以2017年中国专利调查数据为依据，考察了专利诉讼对于企业自主创新战略的影响。实证分析表明，专利诉讼经历能够有效激励涉诉企业进行自主创新，这一结论在采用倾向得分匹配法和加粗精确匹配法，以及采用工具变量法和条件混合过程方法后仍然稳健。这表明知识产权司法保护有利于促进企业自主创新。异质性分析表明，知识产权司法保护对于企业自主创新的促进作用在小微企业、专利依赖型产业的企业以及内资企业中更为显著。

After more than four decades of rapid development, Chinese firms have reached the threshold of transformation from imitation to innovation, from technological follower to parallel walker and leader. However, this transformation requires plenty of conditions especially the support of high standards and high-strength intellectual property protection. The higher the intensity of intellectual property protection, the more distinct the property rights boundary of firms' innovation achievements, and the more inclined firms are to win market competition through innovation. Among varieties of ways of intellectual property protection, judicial protection plays a leading role and determines the intensity of intellectual property protection to a large extent. As an important way of intellectual property judicial protection, whether patent litigation can promote Chinese firms’ indigenous innovation is directly related to the transformation of firms’ innovation strategy. Based on the 2017 patent survey data of Chinese firms, this paper examines the impact of patent litigation on firms' indigenous innovation strategies. We find that the experience in patent litigation can effectively stimulate indigenous innovation for the firms involved. This finding is robust in adopting propensity score matching method and coarsened exact matching method, as well as using instrumental variable method and conditional mixed process method. This indicates that judicial protection of intellectual property rights is conducive to promoting firms’ indigenous innovation. The heterogeneity analysis shows that the promoting effect of judicial protection of intellectual property rights on firm’s innovation is more significant for small and micro firms and firms in patent-dependent industries as well as domestic firms.This paper contributes to the literature from the two perspectives. Firstly, different from the existing research focusing on the impact of patent litigation on the R&D investment, patent application and management of the firms involved, this study explores the effect of patent litigation on firms' indigenous innovation strategies, which enriches the literature on the innovation effect of patent litigation. Secondly, compared with existing literature examining the influence of firms' own characteristics and market environment on firms' indigenous innovation，this paper focuses on the role of judicial protection of intellectual property rights, extending the research on the influencing factors of indigenous innovation.This paper has the following implications for intellectual property policy in China. Firstly, we need to improve the judicial protection system of intellectual property rights to stimulate firms' indigenous innovation. Specifically, to carry out the judicial adjudication mode of "integration of three trials", speed up the development of intellectual property judge team and ensure the fairness and efficiency of patent judicial adjudication. Secondly, the patent judicial protection system needs to pay appropriate attention to special firm groups. Since small and micro firms are weak in litigation ability, it is suggested to improve the convenience and friendliness of the judicial system for these firms. Firms in patent-dependent industries are prone to get caught in the "patent thicket" and patent disputes. Therefore, it is proposed to improve the professional level of judges and increase the efficiency of trials, especially in "patent thicket" related trials. Considering the disadvantages of domestic firms in litigation resources, we suggest that the judicial system help them reduce litigation costs effectively.