Table 4

The estimated results about the effect of technical barriers to trade on Vietnam's fruit and vegetable exports

VariablesPseudo Poisson maximum likelihood (PPML)Generalized least squares (GLS)
lnPOPf−0.114*** (0.011)−2.231*** (0.201)
lnPOPh0.225 (0.281)6.222 (5.176)
GDPf0.071*** (0.009)1.428*** (0.161)
GDPh−0.002 (0.027)−0.348 (0.504)
TOf−0.0004 (0.000)−0.005 (0.005)
TOh0.0005*** (0.000)0.008** (0.003)
EX0.0001*** (2.53e−06)0.0002*** (0.000)
lnDIS−0.041*** (0.011)−0.636*** (0.200)
X1−0.008 (0.010)−0.114 (0.163)
X2−0.001 (0.008)−0.056 (0.159)
X3−0.004* (0.002)−0.079*** (0.027)
X40.0001*** (0.000)0.002*** (0.000)
BOR0.317** (0.030)6.127*** (0.540)
CPTPP−0.199** (0.081)−3.518*** (1.410)
I0.001** (0.003)0.013** (0.005)
COVID−0.007*** (0.003)−0.126** (0.052)
GEf0.003 (0.006)0.0869 (0.293)
GEh0.0132* (0.019)0.264** (0.125)
R-squared0.914 
Prob > χ2 0.000

Note(s): Standard errors are robust in the parentheses

***, ** and * are statistically significant at 1%, 5% and 10% levels, respectively

Source(s): Author's calculation

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