@article{Weiss:143021,
      recid = {143021},
      author = {Weiss, Martin},
      title = {Stata tip 80: Constructing a group variable with specified  group sizes},
      journal = {Stata Journal},
      address = {2009},
      number = {199-2016-2658},
      pages = {3},
      year = {2009},
      url = {http://ageconsearch.umn.edu/record/143021},
      doi = {https://doi.org/10.22004/ag.econ.143021},
}