What attributes of extra virgin olive oil are really important for consumers: a meta-analysis of consumers’ stated preferences

Agricultural and Food Economics

Table 2 Assessment of implemented econometric models

Variable	Meta-regression		Fixed effect meta-regression		Random effect meta-regression
	Coeff	std-dev	Coeff	std-dev	Coeff	std-dev
Olive origin certification	0.474***	0.144	0.489***	0.151	0.496***	0.107
Brand	0.521**	0.243	0.608***	0.207	0.531***	0.193
Neutral taste	0.251	0.173	0.197***	0.056	0.194	0.21
Traceability	0.033	0.041	0.145	0.105	0.12	0.08
Organic certification	0.393*	0.215	0.577***	0.139	0.403	0.32
Peer-reviewed article	−0.276	0.192	−0.355***	0.124	−0.324***	0.096
Italy-based survey	−0.416***	0.112	−0.646***	0.238	−0.459***	0.143
Constant	0.579	0.439	0.12	0.215	0.245	0.201
R²	0.3078		0.3192
τ²					0.029
I ²					15.20 %
Adj R²					81.28 %
Q_E					64.37 (χ² 89.39; df 69; p<0.05)
F (8, 69)	3.84		4.05		8.05
Prob>F	0.0009		0.0005		<0.0001