Table A9 Hausman test for Equation (4) .... | Emerald Publishing

Table A9

Hausman test for Equation (4).

Conditional fixed-effects Poisson regression
ln_FC_ij	Coef.	St.Err.	t-value	p-value	[95% Conf	Interval]	Sig
ln_GDP_Cap_j	0.105	0.023	4.63	0	0.061	0.15	***
ln_GDP_Cap_i	0.077	0.027	2.84	0.005	0.024	0.13	***
AfCFTA_ij	0.009	0.021	0.43	0.665	−0.031	0.049
ln_Dist	−0.257	0.189	−1.36	0.173	−0.627	0.112

Conditional fixed-effects Poisson regression
ln_FC_ij	Coef.	St.Err.	t-value	p-value	[95% Conf	Interval]	Sig
ln_GDP_Cap_j	0.105	0.023	4.63	0	0.061	0.15	***
ln_GDP_Cap_i	0.077	0.027	2.84	0.005	0.024	0.13	***
AfCFTA_ij	0.009	0.021	0.43	0.665	−0.031	0.049
ln_Dist	−0.257	0.189	−1.36	0.173	−0.627	0.112

Mean dependent var	6.343	SD dependent var	3.342
Number of obs	4,393	Chi-square	42.973
Prob > χ²	0.000	Akaike crit. (AIC)	15955.734

Random-effects Poisson regression
ln_FC_ij	Coef.	St.Err.	t-value	p-value	[95% Conf	Interval]	Sig
ln_GDP_Cap_j	0.124	0.017	7.13	0	0.09	0.158	***
ln_GDP_Cap_i	0.056	0.018	3.17	0.002	0.021	0.09	***
AfCFTA_ij	0.002	0.02	0.09	0.929	−0.037	0.041
ln_Dist	−0.181	0.044	−4.15	0	−0.267	−0.096	***
Lang_ij	0.152	0.054	2.81	0.005	0.046	0.258	***
contig	0.215	0.106	2.02	0.044	0.006	0.423	**
Constant	2.995	0.347	8.63	0	2.315	3.675	***
lnalpha	−1.69	0.089	.b	.b	−1.865	−1.516

Random-effects Poisson regression
ln_FC_ij	Coef.	St.Err.	t-value	p-value	[95% Conf	Interval]	Sig
ln_GDP_Cap_j	0.124	0.017	7.13	0	0.09	0.158	***
ln_GDP_Cap_i	0.056	0.018	3.17	0.002	0.021	0.09	***
AfCFTA_ij	0.002	0.02	0.09	0.929	−0.037	0.041
ln_Dist	−0.181	0.044	−4.15	0	−0.267	−0.096	***
Lang_ij	0.152	0.054	2.81	0.005	0.046	0.258	***
contig	0.215	0.106	2.02	0.044	0.006	0.423	**
Constant	2.995	0.347	8.63	0	2.315	3.675	***
lnalpha	−1.69	0.089	.b	.b	−1.865	−1.516

Mean dependent var	6.341	SD dependent var	3.343
Number of obs	4,394	Chi-square	125.573
Prob > χ²	0.000	Akaike crit. (AIC)	18837.912

Hausman specification test
	Coef.
Chi-square test value	2.338
p-value	0.674

Note(s): ***p < 0.01, **p < 0.05, *p < 0.1

Source(s): Authors’ compilation