Firm size and innovative performance: a meta-analysis across of 25 years of evidence

This study conducts a comprehensive meta-regression analysis to examine the relationship between firm size and innovative performance, utilizing 95 empirical studies published between 1993 and 2017. By incorporating 655 econometric estimations from these studies, we aim to identify key factors contributing to the heterogeneity observed in the empirical literature. Our findings confirm a positive average effect of firm size on innovative performance, reinforcing the theoretical expectation that larger firms tend to be more innovative due to economies of scale and greater resource availability. However, this relationship is moderated by various contextual and methodological factors that affect results, such as the measures used for firm size and innovation, the type of innovation considered (product or process), and the geographic context (developed or developing countries). This study contributes to the literature by presenting one of the most comprehensive meta-analyses on this topic to date, introducing new moderator variables, and offering deeper insights into the sources of heterogeneity. The results not only reinforce the most common hypotheses on the size-innovation relationship but also provide a nuanced understanding of the variations in empirical results. By highlighting the importance of measurement choices and firm characteristics in understanding the firm size-innovation nexus, this study offers valuable guidance for future research, enabling a more refined approach to investigating this complex relationship.