[1] Univ Philippines Visayas, Div Social Sci, Miagao, Philippines
[2] Natl Econ Univ, Dept Nat Resources & Environm Econ, Hanoi, Vietnam
[3] Natl Econ Univ, Fac Tourism & Hospitality, Hanoi, Vietnam
[4] Can Tho Univ, Fac Econ, Can Tho, Vietnam
[5] Natl Econ Univ, Fac Mkt, Hanoi 11600, Vietnam
[6] Univ Philippines Visayas, Miagao, Iloilo, Philippines
[7] CGIAR Res Program Climate Change Agr & Food Secur, Hanoi, Vietnam