Table 7 Checking results for the existence of the inverse U shape curve.

From: Risk spillovers of carbon emissions in international trade: the role of disembodied technology communications

 

Lower bound

Upper bound

Interval

154.3564

6453.277

Slope

2.7202

−1.2894

t-value

23.5736

−4.8259

P > |t|

1.1e-101

7.86e-07

  1. Note: The null hypothesis is “Monotone or U shape” (H0: Monotone or U shape), and the alternative hypothesis is “Inverse U-shape” (H1: Inverse U-shape); The extreme point is 4427.647; The t-value of the overall check for the existence of inverse U-shape curve is 4.83, and the corresponding p-value is 7.86e-07.
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