Table 4.
Estimates of respondents’ willingness to pay (WTP) for combined attributes of leptospirosis vaccine
| Leptospirosis Case Respondents | Non-Leptospirosis Case Respondents | Difference | |
|---|---|---|---|
| [1] | [2] | [1]–[2] | |
| Vaccine Attribute Combinations | WTP in pesosa | WTP in pesosa | |
| (95% C.I.) | (95% C.I.) | (│t│-Ratio) | |
| Scenario 1: | |||
| EFFICACY of 70–80% | 1,903.88 | 1,297.39 | 606.49*** |
| PROTECTION of 7 years | (1,413.35∼2,394.41) | (1,057.35∼1,537.43) | (31.41) |
| MODERATE RISK of side-effects | |||
| Given in 2 SHOTS | |||
| Scenario 2: | |||
| EFFICACY of 90–100% | 2,745.62 | 1,743.19 | 1,002.43*** |
| PROTECATION of 10 years | (2,174∼3,316.43) | (1,504.74∼1,981.64) | (49.33) |
| MILD RISK of side-effects | |||
| Given in 1 SHOT |
***denotes statistical significance at 1%; a1 peso = US$ 0.024 based on October 2012 exchange rate.