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Table 5 Determinants of willingness to pay

From: Willingness to pay for social health insurance among informal sector workers in Wuhan, China: a contingent valuation study

Dependent variables WTP for baseline BHI (ln) WTP for BHI without ceiling (ln) WTP for BHI without deductible (ln) WTP for BHI without coinsurance (ln)
Model 1.1 1.2 2.1 2.2 3.1 3.2 4.1 4.2
Regression Interval regression OLS Interval regression OLS Interval regression OLS Interval regression OLS
AGE -0.013 -0.014 -0.014 -0.016 -0.014 -0.015 -0.010 -0.012
  (0.0039) (0.0043) (0.0044) (0.0048) (0.0037) (0.0041) (0.0049) (0.0052)
  0.0010 0.0018 0.0013 0.0017 0.0002 0.0003 0.0356 0.0294
MALE -0.203 -0.221 -0.154 -0.166 -0.198 -0.212 -0.212 -0.226
  (0.0558) (0.0635) (0.0756) (0.0843) (0.0643) (0.0721) (0.0670) (0.0745)
  0.0003 0.0010 0.0416 0.0538 0.0020 0.0046 0.0016 0.0036
EDU2 0.140 0.148 0.156 0.154 0.219 0.227 0.151 0.150
  (0.0978) (0.1097) (0.1260) (0.1409) (0.1126) (0.1260) (0.1076) (0.1187)
  0.1527 0.1825 0.2157 0.2786 0.0522 0.0764 0.1614 0.2099
EDU3 0.084 0.083 0.133 0.122 0.207 0.206 0.165 0.163
  (0.1182) (0.1311) (0.1424) (0.1579) (0.1424) (0.1575) (0.1264) (0.1390)
  0.4761 0.5275 0.3515 0.4443 0.1461 0.1951 0.1913 0.2488
EDU4 0.222 0.230 0.333 0.334 0.347 0.356 0.305 0.302
  (0.1527) (0.1682) (0.1645) (0.1827) (0.1561) (0.1734) (0.1470) (0.1622)
  0.1458 0.1768 0.0429 0.0724 0.0262 0.0447 0.0379 0.0676
INCOME (ln) 0.439 0.468 0.469 0.499 0.458 0.489 0.434 0.461
  (0.0504) (0.0542) (0.0588) (0.0642) (0.0574) (0.0622) (0.0566) (0.0613)
  < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001
MIGRANT -0.345 -0.373 -0.214 -0.224 -0.174 -0.187 -0.287 -0.303
  (0.0888) (0.1025) (0.0979) (0.1108) (0.0915) (0.1050) (0.1033) (0.1157)
  0.0001 0.0006 0.0285 0.0475 0.0566 0.0800 0.0054 0.0113
EMPLOY 0.224 0.232 0.258 0.273 0.191 0.198 0.290 0.300
  (0.0835) (0.0910) (0.0930) (0.1022) (0.0826) (0.0905) (0.0872) (0.0962)
  0.0073 0.0133 0.0055 0.0098 0.0209 0.0324 0.0009 0.0028
HEX (ln) 0.076 0.083 0.139 0.148 0.090 0.098 0.087 0.093
  (0.0198) (0.0210) (0.0220) (0.0234) (0.0203) (0.0216) (0.0236) (0.0248)
  0.0001 0.0002 < 0.0001 < 0.0001 < 0.0001 < 0.0001 0.0002 0.0004
Constant 0.008 -0.266 0.204 -0.026 0.265 0.019 0.182 -0.035
  (0.3315) (0.3617) (0.3853) (0.4270) (0.3893) (0.4239) (0.4001) (0.4358)
  0.9815 0.4642 0.5957 0.9508 0.4965 0.9643 0.6495 0.9363
N 609 609 609 609 609 609 609 609
F   22.7   23.1   21.7   19.11
Log likelihood -1308   -1486   -1433   -1475  
R 2   0.247   0.259   0.242   0.213
McKelvey and Zavoina's R 2 0.266   0.277   0.257   0.224  
p value < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001
  1. The numbers in the cells are regression coefficient, heteroscedasticity-robust standard error adjusted for clustering of the data in 60 primary sampling units (in brackets) and p value.
  2. WTP = willingness to pay, BHI = basic health insurance, OLS = ordinary least squares regression, ln = natural logarithm