Table 4.

Random parameter logit results with socio-demographics interaction terms.

Variables	With Gender Interaction	With Age Interaction		With Education Interaction	With Income Interaction
Price	−0.064 ***	−0.065 ***		−0.065 ***	−0.065 ***
	(0.002)	(0.002)		(0.002)	(0.002)
Fermented feed	0.393 ***	0.347 ***		0.246 ***	0.252 ***
	(0.052)	(0.055)		(0.055)	(0.044)
100% more space	0.142 **	0.146 **		0.106	0.121 **
	(0.067)	(0.071)		(0.070)	(0.057)
100% more space and outdoor access	0.603 ***	0.572 ***		0.602 ***	0.618 ***
	(0.070)	(0.074)		(0.074)	(0.061)
Optimal care	0.440 ***	0.512 ***		0.344 ***	0.386 ***
	(0.053)	(0.057)		(0.056)	(0.046)
Entertainment environment	0.166 ***	0.240 ***		0.174 ***	0.114 **
	(0.059)	(0.063)		(0.062)	(0.050)
No purchase	−6.768 ***	−6.773 ***		−6.776 ***	−6.745 ***
	(0.234)	(0.234)		(0.236)	(0.232)
Interaction items between attributes and socio-demographics	Female	Middle Age (26–35)	Advanced Age (≥36)	High Education (≥16)	High Income (≥12,000)
Fermented feed ×	−0.021	0.088	0.002	0.196 ***	0.253 ***
	(0.065)	(0.075)	(0.079)	(0.067)	(0.063)
100% more space ×	0.016	−0.026	0.044	0.063	0.060
	(0.083)	(0.098)	(0.100)	(0.086)	(0.081)
100% more space and outdoor access ×	0.117	0.105	0.202 *	0.109	0.116
	(0.086)	(0.100)	(0.105)	(0.088)	(0.083)
Optimal care ×	−0.015	−0.134 *	−0.103	0.126 *	0.086
	(0.066)	(0.077)	(0.080)	(0.068)	(0.064)
Recreational environment ×	−0.001	−0.095	−0.128	−0.017	0.102
	(0.074)	(0.086)	(0.090)	(0.076)	(0.072)
Number of observations	22,932	22,932		22,932	22,932
Wald chi2	−5683.6497	−5678.736		−5678.379	−5673.9201
Log likelihood	847.75	847.31		846.94	831.47
AIC	11,403.3	11,403.47		11,392.76	11,383.84

Note: ***, **, and * indicate statistical significance at the 1%, 5%, and 10% levels, respectively. The numbers in parentheses are standard errors. The standard deviation of random parameters for each attribute variable is not reported in this paper due to space limitations.