Variable | Definition | Mean | Std. Dev. | Min | Max |
Edu | Years of education (numbers) | 10.97 | 4.80 | 0 | 20 |
Ratiomf | Ratio of male to female | 1.22 | 0.75 | 0 | 4 |
Lnlncome | Logarithm of gross income (thousand VND) | 19.079 | 0.617 | 17.3990 | 20.7233 |
Fpayelect | Feel that the paid money for electricity households’ consumption monthly is (very much = 5; much = 4; normal = 3; little = 2; very little = 1) | 3.29 | 0.73 | 0 | 5 |
Votepes | Dummy variable of vote for payment for environmental services (yes = 1; no = 0) | 0.77 | 0.41 | 0 | 1 |
Wtpl | Lower bound of the WTP interval | 16,327 | 30,372 | 0 | 200,000 |
Wtpu | Upper bound of WTP interval | 31,279 | 46,020 | 5,000 | 250,000 |
Midwtp | Midpoint of the WTP interval | 23,803 | 38,042 | 2,500 | 225,000 |
Lnwtpl | Logarithm of the lower bound of the WTP interval | 4.339 | 5.042 | 0 | 12.206 |
Lnwtpu | Logarithm of the upper bound of WTP interval | 9.45 | 1.25 | 8.51 | 12.42 |
Lnmidwtp | Logarithm of the midpoint of WTP interval | 8.94 | 1.45 | 7.8240 | 13.3847 |