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Table 7 Marginal effects of factors influencing WTP values

From: Assessing willingness to pay for health care quality improvements

Independent variable Geographical proximity Waiting time Attitude of hospital staff Seeing the same doctor Doctor-patient relationship Drug availability Chance of recovery
β′ β″ β′ β″ β′ β″ β′ β″ β′ β″ β′ β″ β′ β″
GPVFAR 0.39*** 30.65*** - - - - - - - - - - - -
GPFAR 0.24*** 18.87*** - - - - - - - - - - - -
GPAVG 0.16** 10.73** - - - - - - - - - - - -
WTVLONG - - 0.31*** 19.96*** - - - - - - - - - -
WTLONG - - 0.28*** 18.60*** - - - - - - - - - -
WTAVG - - 0.18** 12.32 - - - - - - - - - -
WTNLONG - - 0.06 3.47 - - - - - - - - - -
ATTDVBAD - - - - 0.09 4.54 - - - - - - - -
ATTDBAD - - - - −0.23** −7.68** - - - - - - - -
ATTDGOOD - - - - −0.21*** −9.66 - - - - - - - -
SAMNEVER - - - - - - 0.19*** 13.46* - - - - - -
SAMRARE - - - - - - −0.30** −12.62*** - - - - - -
SAMEOFTN - - - - - - −0.05 −2.64 - - - - - -
DPRSC - - - - - - - - −0.002** −0.62** - - - -
DRUGNONE - - - - - - - - - - 0.21*** 56.03*** - -
DRUGSOME - - - - - - - - - - 0.06 19.84 - -
RECOVSC - - - - - - - - - - - - −0.007*** −1.67***
SEX 0.02 1.17 0.04 2.52 −0.002 −0.10 −0.02 −1.44 −0.03 −8.39 0.04 13.11 −0.08** −17.64**
AGE −0.003*** −0.21*** −0.002* −0.12* −0.002 −0.08 −0.003** −0.16** −0.001* −0.34* 0.0001 0.03 −0.0006 −0.13
EDUC 0.005 0.31 0.01* 0.54 0.0009 0.03 0.003 0.16 −0.004 −0.90 −0.002 −0.81 −0.001 −0.22
INCOME 1.13e-06 0.00006 1.88e-06 0.00009 2.67e-06 0.0001 6.7e-06*** 0.0003*** 6.23e-06*** 0.001*** 4.09e-06*** 0.001*** 5.26e-06*** 0.001***
LOCATION −0.06 −4.04 0.01 0.96 −0.40 −1.61 0.01 0.90 −0.05 −12.78 −0.05 −16.47 −0.03 −8.34
NATURE −0.02 −1.18 −0.13** −7.24** −0.13** −5.23** −0.13** −6.80** 0.07** 17.77** −0.03 −10.21 0.05 11.94
REASON −0.05 −3.34 0.005 0.27 0.03 1.54 −0.04 −2.11 −0.03 −6.75 −0.03 −9.27 −0.02 −4.90
  1. Notes: β′ is the marginal effects for the probability of being uncensored and β″ is the marginal effects for the expected WTP value conditional on being uncensored: E (WTP | WTP > 0). *P < 0.10; **P < 0.05; ***P < 0.01.