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Table 4 Stage 1: Regression models (logit) Independent variable: linkages

From: Knowledge flows and linkage with universities: the vision of Mexican farmers

  Model 1 Model 2 Model 3 Model 4
Elementary −0.387 −0.378 −0.352  
  −1.52 −1.46 −1.39  
University     −0.019
     −0.07
Training 0.168    
  (4.17)***    
ln_training   0.737 0.735 0.755
   (5.32)*** (5.42)*** (5.39)***
Product-system 0.813 0.751 0.674 0.768
  (3.32)*** (3.01)*** (2.81)*** (3.08)***
Farmers’ associations 0.623 0.572 0.51 0.626
  (2.49)** (2.25)** (2.10)** (2.47)**
Age 0.122 0.135 −0.011 0.127
  (2.06)** (2.24)** −1.1 (2.13)**
sqr_age −0.001 −0.001   −0.001
  (2.27)** (2.42)**   (2.40)**
Size −0.001 −0.001   −0.001
  −0.59 −0.68   −0.52
Crop1 −0.378 −0.356   −0.358
  −1.31 −1.22   −1.23
Crop2 0.018 0.035   0.032
  −0.05 −0.09   −0.08
South −0.921 −1.034 −0.693 −1.051
  (2.11)** (2.33)** (1.78)* (2.38)**
West_centre −1.364 −1.417 −1.228 −1.383
  (4.32)*** (4.41)*** (4.07)*** (4.31)***
Centre −1.666 −1.713 −1.32 −1.723
  (4.23)*** (4.26)*** (3.75)*** (4.28)***
Temporal 0.44 0.443   0.441
  −1.48 −1.46   −1.46
Constant −2.438 −2.915 0.354 −2.792
  −1.62 (1.91)* −0.64 (1.83)*
Observations 412 412 412 412
LR Chi2(8) 96.41 105.03 92.97 102.91
Pseudo R2 0.1689 0.184 0.1629 0.1803
  1. Absolute value of z statistics in parentheses
  2. * Significant at 10 %; ** Significant at 5 %; *** Significant at 1 %