@article{O'Neil:311416,
      recid = {311416},
      author = {O'Neil, Katherine K. and Nelson, David O.},
      title = {An assessment of empirical choice set formation},
      address = {1981},
      year = {1981},
      note = {Proceedings of the Transportation Research Forum  - 22nd -  1981},
      url = {http://ageconsearch.umn.edu/record/311416},
      doi = {https://doi.org/10.22004/ag.econ.311416},
}