[1] Univ Queensland, Ctr Business & Econ Hlth, Brisbane, Qld, Australia
[2] Oregon State Univ, Sch Publ Policy, Econ, Corvallis, OR USA
[3] Univ Melbourne, Melbourne Inst Appl Econ & Social Res, Parkville, Vic, Australia
[4] Univ Queensland, Sch Econ, Brisbane, Qld 4072, Australia
[5] Univ Queensland, Ctr Efficiency & Prod Anal, Brisbane, Qld 4072, Australia