Table 2.

Single Bounded Probit Model Maximum Likelihood Estimates

Variable		Treatment			Prevention
Name	Explanation	Coefficient	S.E.	P	Coefficient	S.E.	P=
Intercept		2.3831	0.408	0.0001	2.5192	0.454	0.0001
Bid	Gourdes	-0.0001	0.00001	0.0001	-0.0169	0.0024	0.0001
Income	Gourdes/month	0.0004	0.0001	0.0001	0.0004	0.0002	0.0116
Sex	(0 = female, 1 = male)	-0.0562	0.178	0.7517	-0.0473	0.186	0.7993
Age	Years	-0.0184	0.006	0.0012	-0.0083	0.006	0.1443
House Type	(0 = cement, 1 = wood or thatch)	-0.6615	0.145	0.0001	-0.4318	0.149	0.0039
Knowledge	Correctly identify causes of filariasis (0 = yes, 1 = no)	-0.5014	0.188	0.0077	-0.0983	0.199	0.6214
Familiarity	Family member with lymphedema or hydrocele (0 = no, 1 = yes)	-0.4476	0.181	0.0133	-0.3865	0.197	0.0498
Magic	Belief in magic etiology of lymphedema (0 = no, 1 = yes)	-0.5692	0.163	0.0005	-0.0124	0.170	0.9420
Household Number	Number of people living in household				0.0014	0.025	0.9559
Perceived Risk	0 = not or somewhat risky, 1 = risky or very risky				0.3283	0.216	0.1283

Note: The probit model describes the likelihood that a household with specific characteristics would be willing to pay different amounts, rather than predicting a single deterministic WTP value