This supplement contains auxiliary technical results and proofs omitted from Bloedel, Krishna, and Leukhina (2025) (henceforth BKL) and its Supplemental Appendix (henceforth SA). First, Section I proves parts (a)–(c) and (e)–(f) of Theorem 3 from Appendix B.1 of BKL. (Part (d) of Theorem 3...

This paper investigates how the presence of foreign direct investment (FDI) contributes to domestic innovation with a focus on green technologies in the European regions between 2013 and 2018. Using a rich dataset combining patent data, firm-level data and FDI proxies, we identify a clear...