Conclusion, limitations and future research
This paper sets out to explore, through an SLR, the literature on (open) innovation and M&As. We can conclude that there is established literature that addresses the concepts of M&A and innovation jointly. However, we have shown in this review that we cannot confirm the same about M&A and open innovation. While it is common in the literature to explain open innovation practice and to investigate open innovation sources, no study has yet systematically captured it in relation to M&A. In particular, there are many implications that can be studied and mastered, but only if researchers consider M&A activities as a reason for open innovation. More research is necessary to examine M&A operations under the wider approach of open innovation. This study can be used as an input for future study with the aim of focusing more on M&A operations and, specifically, their relationship with open innovation.
For example, it could be interesting to explore the effects of M&A as an individual open innovation practice on the innovation performance of firms, and/or to investigate whether there are some complementary or substitute effects with other well-established open innovation practices. In fact, in some cases the amount of resources needed for a long M&A process can mean that a firm does not have enough resources to pursue also open innovation activities.