@article{GershonRuiperezValienteAlexandron2021,
  author    = {Sa'ar Karp Gershon and Jos{\´e} A. Ruip{\´e}rez-Valiente and Giora Alexandron},
  title     = {MOOC Monetization Changes and Completion Rates},
  journal   = {EMOOCs 2021},
  series    = {Are Learners from Countries of Different Development Status Equally Affected?},
  volume    = {2021},
  pages     = {169 -- 179},
  doi       = {10.25932/publishup-51718},
  year      = {2021},
}