Table 4. Statistical analysis for WTP....

Table 4.

Statistical analysis for WTP. Two-part model

	WTP – first part (Prob WTP = 0)	WTP – second part (WTP > 0)
	WTP Marginal effect (SE)¹	Marginal effect (SE) High WTP²	Marginal effect (SE) Medium WTP³	Marginal effect (SE) Low WTP⁴
(a) Without considering “zero protest” and “economic zero” responses
Female	−0.049 (0.049)	0.029 (0.0462)	0.001 (0.003)	−0.030 (0.049)
Age (medium)	0.055 (0.063)	0.104 (0.060)*	0.006 (0.007)	−0.110 (0.064)*
Age (high)	0.119 (0.063)*	−0.106 (0.056)*	−0.006 (0.069)	0.112 (0.059)*
Coping with caring (negative)	−0.223 (0.103)**	0.007 (0.096)	0.000 (0.006)	−0.008 (0.102)
Formal services at home	0.221 (0.064)***	0.056 (0.057)	0.035 (0.004)	−0.060 (0.061)
High caregiving hours	0.082 (0.050)	0.142 (0.046)***	0.008 (0.008)	−0.151 (0.048)***
High social support	0.112 (0.062)*	0.059 (0.058)	0.003 (0.004)	−0.062 (0.062)
Medium household income	−0.127 (0.055)**	0.024 (0.053)	0.001 (0.003)	−0.026 (0.056)
High household income	−0.118 (0.067)*	0.192 (0.061)***	0.011 (0.012)	−0.204 (0.067)***
Granada	0.190 (0.517)***	−0.162 (0.051)***	−0.010 (0.009)	0.172 (0.053)***
High HRQoL	–	0.068 (0.050)	0.004 (0.005)	−0.072 (0.053)
	N = 468 LR Chi² = 47.05 R² = 0.0725 McFadden’s Adj R²: 0.051 Cragg–Uhler (Nagelkerke) R²: 0.146	N = 232 LR Chi² = 63.04 R² = 0.1239 McFadden’s Adj R²: 0.073 Cragg–Uhler (Nagelkerke) R²: 0.268

	WTP – first part(Prob WTP = 0)	WTP – second part(WTP > 0)
	WTPMarginal effect (SE)¹	Marginal effect (SE)High WTP²	Marginal effect (SE)Medium WTP³	Marginal effect (SE)Low WTP⁴
(a) Without considering “zero protest” and “economic zero” responses
Female	−0.049 (0.049)	0.029 (0.0462)	0.001 (0.003)	−0.030 (0.049)
Age (medium)	0.055 (0.063)	0.104 (0.060)*	0.006 (0.007)	−0.110 (0.064)*
Age (high)	0.119 (0.063)*	−0.106 (0.056)*	−0.006 (0.069)	0.112 (0.059)*
Coping with caring (negative)	−0.223 (0.103)**	0.007 (0.096)	0.000 (0.006)	−0.008 (0.102)
Formal services at home	0.221 (0.064)***	0.056 (0.057)	0.035 (0.004)	−0.060 (0.061)
High caregiving hours	0.082 (0.050)	0.142 (0.046)***	0.008 (0.008)	−0.151 (0.048)***
High social support	0.112 (0.062)*	0.059 (0.058)	0.003 (0.004)	−0.062 (0.062)
Medium household income	−0.127 (0.055)**	0.024 (0.053)	0.001 (0.003)	−0.026 (0.056)
High household income	−0.118 (0.067)*	0.192 (0.061)***	0.011 (0.012)	−0.204 (0.067)***
Granada	0.190 (0.517)***	−0.162 (0.051)***	−0.010 (0.009)	0.172 (0.053)***
High HRQoL	–	0.068 (0.050)	0.004 (0.005)	−0.072 (0.053)
	N = 468LR Chi² = 47.05R² = 0.0725McFadden’s Adj R²: 0.051Cragg–Uhler (Nagelkerke) R²: 0.146	N = 232LR Chi² = 63.04R² = 0.1239McFadden’s Adj R²: 0.073Cragg–Uhler (Nagelkerke) R²: 0.268

	WTP – first part (Prob WTP = 0)	WTP – second part (WTP > 0)
	WTP Marginal effect (SE)¹	Marginal effect (SE) High WTP²	Marginal effect (SE) Medium WTP³	Marginal effect (SE) Low WTP⁴
(b) Predicted “zero protest” and “economics zero” were considered
Female	−0.034 (0.047)	0.019 (0.041)	0.001 (0.003)	−0.018 (0.044)
Age (medium)	0.037 (0.061)	0.078 (0.054)	0.005 (0.006)	−0.084 (0.058)
Age (high)	0.102 (0.061)*	−0.099 (0.051)*	−0.007 (0.007)	0.106 (0.055)*
Coping with caring (negative)	−0.213 (0.094)**	−0.019 (0.083)	0.001 (0.006)	0.021 (0.089)
Formal services at home	0.110 (0.058)*	0.079 (0.053)	0.004 (0.005)	−0.085 (0.057)
High caregiving hours	0.063 (0.048)	0.124 (0.041)***	0.009 (0.009)	−0.133 (0.044)***
High social support	0.110 (0.058)*	0.057 (0.051)	0.004 (0.005)	−0.061 (0.055)
High household income	−0.084 (0.065)	0.159 (0.058)***	0.011 (0.012)	−0.170 (0.063)***
Medium household income	−0.085 (0.053)	0.009 (0.048)	0.000 (0.003)	−0.010 (0.051)
Granada	0.134 (0.050)***	0.159 (0.058)***	−0.009 (0.009)	0.137 (0.050)***
High HRQoL	–	0.059 (0.045)	0.004 (0.005)	−0.064 (0.048)
	N = 499 LR Chi² = 33.86 R² = 0.0491 McFadden’s Adj R²: 0.017 Cragg–Uhler (Nagelkerke) R²: 0.088	N = 263 LR Chi² = 58.95 R² = 0.1037 McFadden’s Adj R²: 0.058 Cragg–Uhler (Nagelkerke) R²: 0.227

Notes:

First part outcome: “1” whether WTP = 0, “0” whether WTP > 0; second part Outcome: only positive values for WTP; ²WTP > 10; ³2<WTP ≤10; ⁴0<WTP ≤2. High HRQL >0.85 points. Severe burden with Zarit score ≥55 points; N (%); *p < 0.1; **p < 0.05 and ***p < 0.001

Source: Authors’ own

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