Table 13 Results of panel threshold regression.

From: Nonlinear relationship between intellectual property protection and renewable energy innovation in 27 countries

Threshold Variable

FD

 
 

Coefficient

P > t

IPP{FD < 0.427}

−0.804

0.002

IPP {0.427 < FD ≤ 0.7705}

−0.463

0.009

IPP{ FD ≥ 0.7705}

−0.352

0.04

FDI

0.000

0.965

Fiscal

0.268

0

Trade

0.036

0

constant

−1.364

0.496

observations

540

 
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