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Table 1 Estimation results, explaining trade openness in 2012

From: Openness and productivity of the Swiss economy

  Model 1 Model 2 Model 3 Model 4
Constant −2.21*
(− 1.76)
2.43***
(3.96)
− 2.74**
(− 2.31)
2.45***
(6.69)
Population − 0.18***
(− 5.30)
− 0.19***
(− 5.45)
−0.19***
(− 5.80)
−0.20***
(− 9.26)
Demand 0.51***
(5.32)
  0.57***
(6.14)
 
Demand2   0.20***
(5.24)
  0.24***
(8.76)
Adjusted R2 0.70 0.70 0.74 0.77
Standard error 0.29 0.30 0.27 0.26
  1. t statistics in parentheses; *significant at the 10% level; **significant at the 5% level; ***significant at the 1% level. Demand weighted by the inverse of (squared) distance between capitals in model 1 (model 2), weighted by the inverse of (squared) distance between cells model 3 (model 4)