请帮助判断下列格兰杰因果检验结果表中x1、x2、x3、x4之间的相互格兰杰成因

Lags: 4

Null Hypothesis:

Obs

F-Statistic

Prob.

X2 does not Granger Cause X1

732

17.6198

8.00E-14

X1 does not Granger Cause X2

2.21478

0.0658

X3 does not Granger Cause X1

689

8.03033

2.00E-06

X1 does not Granger Cause X3

3.42728

0.0087

X4 does not Granger Cause X1

603

7.30149

1.00E-05

X1 does not Granger Cause X4

4.55353

0.0013

X3 does not Granger Cause X2

1080

2.76532

0.0264

X2 does not Granger Cause X3

42.6582

3.00E-33

X4 does not Granger Cause X2

964

16.7531

3.00E-13

X2 does not Granger Cause X4

2.33593

0.0538

X4 does not Granger Cause X3

891

65.823

1.00E-48

X3 does not Granger Cause X4

0.68368

0.6034