… studied: The first is the level of heterogeneity, namely, the width of the … innovation performance
needs to be further studied. We hypothesize that closeness centrality provides robustness …

… To control for unobserved time-invariant heterogeneity, and the fact … Several tests support
the robustness of our results. … that innovation performance increases with access to structural …

… ) with CCIs on firms’ innovation performance? Do heterogeneity of knowledge sources and
… and ICMs with CCIs in terms of innovation performance? The results contribute to the theory …

… and the sources of its heterogeneity. Hence we examine … from organizational-level factors
such as culture, structure, and … To check for robustness, we also run different models based …

… both inflow and outflow for co-innovation with partners through structured inter-organisational
relationships (coupled OI) (… To lower heterogeneity and achieve more consistent service …

… needed to retrieve population heterogeneity and enable the … whether we analyse innovation
performance through one-… to be more robust ways of encouraging innovation and, by …

… time-invariant unobserved heterogeneity by relying on within-… We perform additional analyses
to assess the robustness of … on codes explaining firm innovation performance and tried to …

… innovation. Using a cross-sectional survey of Chinese small and medium enterprises, our
study shows that organizational structure matters for open innovation … ’ innovation performance …

… robustness of our results. Our unbalanced panel included 670 firms observed over a period
of 20 years. As reported in the Online Appendix, robustness … -group homogeneity of errors …

… To test the factor structure and convergent and discriminant … trolled for the effect of patent
usage heterogeneity on innova- … in Section V and supports the robustness of our results. We …