@Article{Baumann2026,
  author  = {Baumann, Ursel and Cullen, Zoe and Faia, Ester and Ferrando, Annalisa and Perez-Truglia, Ricardo and Rariga, Judit},
  title   = {{Innovation without Borders? The Geography of Technological Diffusion}},
  journal = {NBER Working Paper No. 35314},
  year    = {2026},
}