Table 11 Results of the threshold effect test.

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

Threshold variables

 

RSS

MSE

F stat

Prob

Crit10

Crit5

Crit1

FD

Single

222.3257

0.4275

76.29

0.03

59.6786

71.0938

89.0793

Double

195.5861

0.3761

71.09

0.0167

48.539

56.8239

102.7805

Triple

179.0279

0.3443

48.09

0.7867

130.4055

146.7073

174.2368

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