Table 4.
Attributes and discrete choice options used in the follow-up WTP surveys. Each attribute had two service levels that were associated with it, as listed below, with the exception of price, which had six levels.
| Categorical Attributes and Levels | ||
|---|---|---|
| Discrete choice “0” | Discrete choice “1” | |
| Pit fullness | Emptied before completely full, group discount applied | Emptied only when completely full, no group discount applied |
| Formality of services | Services provided by ‘builders’ (informal day laborers) using buckets and shovels | Services provided by a branded, registered business, with workers wearing uniforms and using protective gear |
| Speed of response | Empty performed within three weeks of request | Empty performed within one week of request |
| Distance of Disposal | Sludge is disposed inside of your cell 1, but outside of your household’s compound | Sludge is disposed outside of your cell2, in an open, public area in Kigali |
| Treatment | Sludge is not treated before disposal (treatment is a process that removes all smells and pathogens) | Sludge is treated before disposal (treatment is a process that removes all smells and pathogens) |
| Prices | ||
| Volumetric Prices | 15, 20, 30, 40, 50, 60 (RwF/Liter) | |
| Volumetric Group Discounts | 5, 10 (RwF/Liter) | |
| Flat fees | 20k, 40k, 45k, 60k, 80k, 90k,100k, 120k (RwF/empty) | |
1 Cells are the smallest geographically denominated government administration unit. In Kigali they are roughly the size of an urban neighborhood.