Variable

Describe

Note

WTP

Willingness to pay of HH

No = 0

Yes = 1

Age

Age of head of HH

Continuous variable

Gender

Gender of head of HH

Male = 1

Female = 0

Nf

Size of HH

Continuous variable

Inc

Income of Interviewees

<7 million VND/month = 1

7 - 15 million VND/month = 2

15 - 25 million VND/month =3

>25 million VND/month = 4

Edu

Education level of head of HH

Under high school = 1

High school = 2

Collge = 3

University/ above university = 4

Cog

Probability to agree or disagree with the statement “people should sacrifice part of their income to protect the environment”

Yes = 1

No = 0

P

Bid

50 thousand VND/month = 1

60 thousand VND/month = 2

70 thousand VND/month = 3

90 thousand VND/month = 4