Table 4

Regression results

VariableCoeff.t-Valuep-ValueVIFTolerance valueModel
PP−0.16−1.800.081.270.79 
EP−0.08−2.400.022.270.44 
PLC−0.20−1.860.071.160.86 
OSG0.082.530.021.370.73 
PSC0.082.420.022.350.42 
SSP0.062.610.011.120.89 
R-square     0.40
Adj R-sq     0.32
F-statistics    4.81
Sig-value    0.00
Hettest 0.20 0.66   
Source: Generated by Authors from Stata 13.1 output, 2021

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