@article{Cox:122608,
      recid = {122608},
      author = {Cox, Nicholas J.},
      title = {Stata tip 67: J() now has greater replicating powers},
      journal = {Stata Journal},
      address = {2008},
      number = {199-2016-2570},
      pages = {2},
      year = {2008},
      url = {http://ageconsearch.umn.edu/record/122608},
      doi = {https://doi.org/10.22004/ag.econ.122608},
}