[1] Colorado State Univ, Dept Agr & Resource Econ, Ft Collins, CO USA
[2] Kansas State Univ, Dept Agr Econ, Manhattan, KS USA
[3] Univ Liverpool, Global Burden Anim Dis Livestock & One Hlth Dept, Liverpool, Merseyside, England
[4] Washington State Univ, Sch Econ Sci & Paul G Allen Sch Global Hlth, Pullman, WA USA