@misc{porat2015world,
  title={World Migration Degree Global migration flows in directed networks},
  author={Idan Porat and Lucien Benguigui},
  year={2015},
  eprint={1511.05338},
  archivePrefix={arXiv},
  primaryClass={physics.soc-ph},
  url={https://arxiv.org/abs/1511.05338}
}