@misc{7465,
  author = {George Borjas and Richard Freeman},
  title = {From immigrants to robots: The changing locus of substitutes for workers},
  year = {2019},
  publisher = {National Bureau of Economic Research},
  address = {Cambridge, MA},
  url = {http://www.nber.org/papers/w25438.pdf},
  doi = {10.3386/w25438},
  language = {eng},
}