An empirical analysis of African trade blocs effects on the global economy: new evidence from the gravity model

Future Business Journal

Table 6 The short run result. Dependent variable: D(export \(_{ijt}\))

Variable	Coefficient	Std. Error	t-statistics	Prob
D(\(GDP_{it}\))	− 0.1413	0.1081	− 1.3070	0.20
D(\(GDP_{jt}\))	1.0532	0.1337	7.8743	0.00***
D(Tariff)	0.0034	0.0043	0.7903	0.44
D(COMESA)	0.1626	0.0519	3.1360	0.00***
D(EAC)	0.0374	0.0397	0.9431	0.35
D(ECCAS)	0.0433	0.0418	1.0383	0.31
D(ECOWAS)	0.0736	0.0212	3.4726	0.00***
D(SACU)	− 0.0010	0.0029	− 0.1606	0.87
D(SADC)	0.0506	0.0146	3.4728	0.00***
language	− 0.0102	0.0169	− 0.6020	0.56
landlock	0.0068	0.113	0.6043	0.55
Multi_member	− 0.0219	0.0172	− 1.2695	0.22
ECM	− 0.8071	0.1838	− 4/3908	0.00***
constant	− 0.0079	0.0074	− 1.0688	0.29
R-squared	0.94	Durbin Watson Stat	1.74
Standard error	0.03
Sum of squared residual	0.02