Public cluster policy and firm performance: evaluating spillover effects across industries

ABSTRACT

While the direct positive effects of public cluster policy on subsidized industries are beyond controversy, the impact of such policy interventions on non-subsidized industries within the same region, that is, the indirect effect of public cluster policy, remains vague and unexplored. This study examines the impact of a prominent public cluster policy in Germany, the so-called Leading-Edge Cluster Competition. Based on a unique dataset, we analyse the spillover effects of this cluster policy initiative on those firms and industries, which have not been the primary target of the cluster policy. Our results suggest that public cluster policy seems to have an indirect negative effect on firms that have not primarily been related to the targeted industries; therefore, the concept of ‘agglomeration shadows’ might also apply to industries and related firms. Despite the existence of knowledge flows induced by additional governmental funding within a region, non-subsidized industries, that is, non-targeted firms, seem to be unable to compete against targeted industries and, therefore, suffer from a lack of human, financial and social capital. Based on our findings, we propose policy recommendations on how to best identify policy instruments aimed at augmenting innovation-driven growth across a broad spectrum of industries and regions.