[1] Hosei Univ, Inst Comparat Econ Studies, Tokyo, Japan
[2] Univ Kragujevac, Dept Global Hlth Econ & Policy, Kragujevac, Serbia
[3] Hacettepe Univ, Dept Econ, Ankara, Turkey
[4] Escola Super Tecnol & Gestao, Inst Politecn Braganca, Braganca, Portugal
[5] Arab Int Univ, Fac Business Adm, Daraa, Syria
[6] Univ Sharjah, Dept Hlth Serv Adm, Sharjah, U Arab Emirates