Abstract: As the key microcosmic bodies in the national and regional innovation systems, enterprises have made their innovation behaviors and the determining mechanism the key topics in academic circles. Following the basic train of thought from micro to macro, this paper reviews the main research results in this field in recent years from the three aspects: corporate heterogeneity, market heterogeneity and macro policy and institution. In general, the influencing factors of corporate R&D behaviors mainly include the financial situation of the enterprises, corporate governance and executives' personal characteristics at the firm level; the competition structure, development level and governance mechanism at the market level; and the macro policies, government intervention, intellectual property protection and other relevant laws and regulations at the government level. However, as to the specific functioning mechanisms, there are many inconsistencies and even contradictions existing in the current literatures. Therefore, in the future researches, attention should be paid to the following points: firstly, it is necessary to further strengthen the determination of research scenarios and research hypotheses, so as to improve the reliability and applicability of research conclusions; secondly, attention should be paid to the business model reconstruction brought by new technologies such as big data and artificial intelligence, the economic management logic and technical logic should be integrated organically, so as to avoid using economic and management theory alone to deduce the internal decisions of corporate R&D behaviors; thirdly, it is necessary to strengthen the investigations and interviews in the front-line practice and the studies of typical cases, so as to avoid pure logical deduction or large sample analysis that lack of practical investigation and survey.

Key words: corporate innovation, corporate heterogeneity, market heterogeneity, government intervention