The Role of the United States in the Relation between Iran and China as Two Key Members of the Asian Global Supply Chain

Table 4

The results of the gravity model.

Variables	LEXP						LIMP
	1		2		3		1		2		3
	Coef	S.E.	Coef	S.E.	Coef	S.E.	Coef	S.E.	Coef	S.E.	Coef	S.E
Constant	−76.802	16.369	−93.223	13.952	−76.520	11.217	−51.352	26.673	−88.037	27.503	−50.870	26.046
LGDPIRN	2.111	0.941	2.284	0.750	2.010	0.681	0.193	1.299	0.496	1.109	0.084	1.277
LGDPCHN	1.011	0.334	1.461	0.336	1.096	0.312	1.725	0.510	2.809	0.494	1.810	0.544
INFIRN	−0.015	0.009	−0.012	0.007	−0.012	0.009	−0.038	0.020	−0.034	0.016	−0.036	0.020
INFCHN	0.004	0.010	0.007	0.009	0.003	0.009	0.026	0.018	0.038	0.014	0.025	0.018
RIALUSD	−2.46E − 06	3.53E − 06	−3.20E − 06	6.65E − 06	−8.21E − 07	5.16E − 06	−3.61E − 07	7.72E − 06	−1.17E − 06	9.90E − 06	6.42E − 07	1.28E − 05
YUANUSD	−0.092	0.040	−0.194	0.052	−0.104	0.033	0.477	0.094	0.253	0.103	0.468	0.093
OILPRICE	0.009	0.003	−0.001	0.005	0.008	0.003	0.027	0.010	0.004	0.011	0.026	0.010
JCPOA			−0.664	0.259					−1.621	0.632
MPP					−0.469	0.359					−0.336	1.202
AR (1)	−0.069	0.160	−0.215	0.149	−0.211	0.149	−0.081	0.265	−0.236	0.218	−0.075	0.262
SIGMASQ	0.035	0.010	0.028	0.010	0.029	0.009	0.168	0.042	0.125	0.036	0.165	0.041
R-squared	98.80%		99.04%		99.03%		97.30%		98.00%		97.36%
F-statistic	220.396		238.011		234.905		96.193		112.690		84.705
Prob (F-statistic)	0.000		0.000		0.000		0.000		0.000		0.000

99%, 95%, and 90% degree of confidence. Source: research estimations based on the IMF data on the direction of trade [23] and the World Development Indicators [21].