Table 5.
Willingness to pay (WTP) resulting from the interaction model, in Narok South District, Kenya, 2006.
| Interaction | WTP (KSh) | WTP (USD) | p |
|---|---|---|---|
| Income*100% safety of the vaccine | 93.75 | 1.34 | <0.001 |
| Income*inclusion of a pH indicator in the vaccine | 100.61 | 1.44 | 0.005 |
| Male gender*100% safety of the vaccine | 143.97 | 2.06 | <0.001 |
| Age*inclusion of a pH indicator in the vaccine | 139.69 | 2.00 | 0.006 |
| Likelihood of CBPP in herd*100% safety of the vaccine | 118.57 | 1.69 | 0.013 |
| Mixing of cattle at salt lick*100% safety of the vaccine | 169.18 | 2.42 | 0.001 |
| Treat against CBPP*inclusion of a pH indicator in the vaccine | 134.32 | 1.92 | 0.030 |
| Mara division*100% safety of the vaccine | 109.87 | 1.57 | 0.008 |
| Years ago since CBPP was experienced*100% safety of the vaccine | 83.39 | 1.19 | 0.044 |
| Number of times CBPP experienced*100% safety of the vaccine | 103.81 | 1.48 | 0.007 |
| Herd size*Government administration of the vaccine | 22.52 | 0.32 | 0.030 |
In the interaction column, * means interaction. Interaction is the influence of one attribute on another. Interaction effect exists when differences in one factor depend on the level of another.