Although R&D spillovers play a key role in the battle for technological leadership, it is unclear under what conditions firms build on and benefit from the discoveries of others. The study described here empirically examines this issue. The findings indicate that, depending on technological opportunities, firm size and competitive pressure, the net impact of R&D spillovers on productivity can be either positive or negative. Specifically, we find that although spillover effects are positively associated with the technological opportunities that a firm faces, this relationship is reversed when firm size is considered. Whilst external R&D affects large self-reliant firms negatively, its impact on the productivity of smaller firms (who usually introduce incremental innovations that are characterized by a strong reliance on external technologies) is positive, and even higher than that of their own R&D. We also demonstrate that the economic payoff for firms' own R&D is lower when they face intense competition. In cases of low-appropriability however, spillover effects are more positive, allowing firms to increase their performance using the inventions of others.
INTRODUCTIONIt has been recognized that industrial Research and Development (R&D) may affect not only the productivity performance of the organization that undertakes such activities (Griliches, 1986;Hall and Mairesse, 1995), but also the performance of other firms.Empirical research confirms the existence of R&D spillovers, indicating that the productivity achieved by a firm depends on the pool of scientific knowledge accessible to it (Adams and Jaffe, 1996;Geroski, 1995;Griliches, 1992;Scherer, 1982). However, past empirical results are conflicting: even though many studies find the impact of R&D spillovers to be both positive and high (Bernstein, 1988; Branstetter, 1996;Raut, 1995), for reasons that are often unclear, other studies find that spillovers have negligible or even negative consequences for firm performance (Antonelli, 1994; Geroski, 1991;Wakelin, 2001). Although it is known that in order to unlock their economic potential, companies must actively search for and exploit external ideas and technologies (Chesbrough, 2003;2007), there is a question that remains unanswered. When do firms utilize successfully external knowledge to create additional value, and when do they fail to do so?This study extends previous research by addressing the above question and indicating that the reason for previously conflicting results may be an incomplete understanding of the factors influencing the spillovers-performance relationship. Put differently, drawing on theories of innovation and knowledge externalities, it examines the conditions under which a firm benefits from the technological achievements and research discoveries of other firms. Specifically, the study focuses on three factors that may influence the assets, resources and market positions of companies and in turn, the impact that spillovers have on their productivity performance. Initially, we ...