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Table 2 The average of WTA and WTP regarding to sociodemographic variables of the samples

From: Mothers’ willingness to accept and pay for vaccines to their children in western Iran: a contingent valuation study

Explanatory variablesMean WTA (SD) in US$ (n = 667)Mean WTP (SD) in US$ (n = 667)
Mother’s age (in year)6.8 (12.6)4.3 (9.7)
Mother’s educational level
Below high school6.2 (12.5)3.4 (8.8)
High school and above7.1 (12.7)4.7 (10.1)
Health insurance coverage
Yes6.8 (12.8)4.4 (9.7)
No6.2 (11.3)4.0 (10.0)
Sex of the child
Female7.2 (12.6)4.7 (10.6)
Male6.3 (12.6)3.9 (8.6)
Mother’s birthplace
Rural7.5 (14.2)3.9 (8.7)
Urban6.6 (12.3)4.4 (9.9)
Monthly household income (US$)
< 805.2 (10.1)2.4 (4.6)
80–1606.3 (12.7)4.5 (10.9)
160–3206.8 (13.0)4.1 (8.6)
> 32012.4 (14.1)8.1 (12.7)
  1. WTA willingness to accept, WTP willingness to pay, SD standard deviation, IRR Iranian Rials. Note: At the time of this study, US$1 was equal to 125,000 IRR