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Table 7 Robustness test for scale heterogeneity (RPL model)

From: The influence of past experience on farmers’ preferences for hog insurance products: a natural experiment and choice experiment in China

Variable Whole sample Treatment group Control group
Coef. SE Coef. SE Coef. SE
Mean     
 ASC − 3.529*** 0.480 − 2.532*** 0.933 − 3.745*** 0.501
 Policy-oriented 1.898*** 0.270 2.095*** 0.296 1.427*** 0.222
 Excess 10a 0.334*** 0.079 0.316*** 0.117 0.333*** 0.088
 Excess 7a 0.772*** 0.104 0.557*** 0.132 0.802*** 0.126
 Premium − 0.211*** 0.026 − 0.123*** 0.023 − 0.232*** 0.034
 Coverage 600b 0.176* 0.100 0.089 0.126 0.208* 0.109
 Coverage 800b 0.517*** 0.101 − 0.055 0.127 0.681*** 0.110
 Coverage 900b 0.725*** 0.114 0.105 0.146 0.914*** 0.124
 Time-mediumc 0.001 0.069 − 0.087 0.104 0.038 0.078
 Time-shortc 0.074 0.072 − 0.053 0.122 0.126* 0.076
Random parameter SD     
 ASC 4.750*** 0.335 4.722*** 0.468 4.635*** 0.388
 Policy-oriented 2.210*** 0.320 1.700*** 0.259 1.999*** 0.240
 Excess 10 − 0.018 0.202 0.004 0.047 − 0.163 0.162
 Excess 7 0.496*** 0.148 − 0.355 0.230 − 0.545*** 0.114
 Scale − 0.687*** 0.123 − 0.130 0.212 − 0.584*** 0.113
 Wald chi2 140.39 89.83 107.76
 Log-likelihood − 1823.69 − 493.15 − 1306.25
 Sample size 395 131 264
  1. ***, **, * indicate statistical significance at 1%, 5% and 10% levels, respectively. Robust standard errors are reported
  2. aThe reference level is in excess of 20 kg
  3. bThe reference level is coverage of CNY 500
  4. cThe reference level is a long claim time