There is wide consensus about the importance of green technologies for achieving superior economic and environmental performances. The literature on their determinants has neglected the creation of green start-ups as a channel to bring about green technologies in the market. Drawing upon the knowledge spillovers theory of entrepreneurship, we test the relevance of local knowledge stocks, distinguishing between clean and dirty stocks, for the creation of green start-ups. Moreover, the effects of the technological composition of local stocks are investigated, by focusing on technological variety, both related and unrelated, as well as on coherence. Consistently with recent literature, green start-ups are associated with higher levels of variety, pointing to the relevance of diverse and heterogeneous knowledge sources, but in related and complementary technological fields.
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