Model

F-statistic^a

95%

90%

Lower bound

Upper bound

Lower bound

Upper bound

Core model

2.9875

4.0957

5.2263

3.3678

4.3697

Expanded model (with lnGDPSQ)

3.9166

2.8115

4.2017

2.3521

3.6020

Expanded model (without lnGDPSQ)

4.7265

3.0317

4.3340

2.5201

3.7260