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Table 2 Assessment of implemented econometric models

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

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 %  
QE      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  
  1. #obs: 78 || *p<0.1; **p<0.05; ***p<0.01.