Table 5 Marginal effects of household and respondent covariates on IRS preferences
| Â | Prob. in high-WTA group | Marginal effect on expected WTA to forego: | |||
|---|---|---|---|---|---|
| Â | Marginal effect | Std. Err. | 10Â % decrease in malaria risk | One round of DDT | One round of ICON |
Household-level variables | |||||
Household size (members) | +0.39Â % | (0.706Â %) | +$0.07 | +$0.35 | +$0.34 |
Average household age (years) | −0.34 %* | (0.191 %) | -$0.06 | -$0.30 | -$0.29 |
Number of children under 10 | −0.93 % | (1.309 %) | -$0.18 | -$0.83 | -$0.81 |
Value of household assets | −0.01 % | (0.004 %) | -$0.00 | -$0.01 | -$0.01 |
Monthly household income | +0.05Â % | (0.038Â %) | +$0.01 | +$0.04 | +$0.04 |
Monthly malaria incidence | −4.06 % | (7.526 %) | -$0.77 | -$3.63 | -$3.54 |
Participated in previous IRSa | +8.53Â % | (7.210Â %) | +$1.62 | +$7.63 | +$7.43 |
Mosquito nets per person | +9.70Â %** | (4.862Â %) | +$1.84 | +$8.68 | +$8.45 |
Respondent-level variables | |||||
Age | +0.11Â % | (0.132Â %) | +$0.02 | +$0.10 | +$0.10 |
Female1 | −5.71 %** | (2.916 %) | -$1.08 | -$5.11 | -$4.97 |
Education \( \ge \) some secondarya | −6.26 % | (4.423 %) | -$1.19 | -$5.61 | -$5.46 |
Ill with malaria in past month?a | +5.05Â % | (3.886Â %) | +$0.96 | +$4.52 | +$4.40 |
Perceived malaria risk | +11.10Â % | (9.599Â %) | +$2.10 | +$9.93 | +$9.67 |
Respondent believes: a | Â | Â | Â | Â | Â |
   Mosquitoes cause malaria | +3.56 % | (5.677 %) | +$0.68 | +$3.19 | +$3.10 |
   Standing water predicts mosquito abundance | +7.56 %*** | (2.787 %) | +$1.43 | +$6.77 | +$6.59 |
   IRS is effective | +19.45 %*** | (6.897 %) | +$3.69 | +$17.41 | +$16.95 |