@article{howmanyonlineworkersarethereinthe,
  title = {How Many Online Workers are there in the World? A Data-Driven Assessment},
  author = {Otto Kässi and Vili Lehdonvirta and Fabian Stephany},
  year = {2021},
  eprint = {2103.12648},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2103.12648v2},
}