How many planet-wide leaders should there be?

Shengyun Liu, Marko Vukolic. How many planet-wide leaders should there be?. SIGMETRICS Performance Evaluation Review, 43(3):3-6, 2015. [doi]

@article{LiuV15-2,
  title = {How many planet-wide leaders should there be?},
  author = {Shengyun Liu and Marko Vukolic},
  year = {2015},
  doi = {10.1145/2847220.2847222},
  url = {http://doi.acm.org/10.1145/2847220.2847222},
  researchr = {https://researchr.org/publication/LiuV15-2},
  cites = {0},
  citedby = {0},
  journal = {SIGMETRICS Performance Evaluation Review},
  volume = {43},
  number = {3},
  pages = {3-6},
}