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Table 8 Robustness analysis

From: How to keep renewable energy enterprises to reach economic sustainable performance: from the views of intellectual capital and life cycle

Model 5

RC

Q = 25

Q = 50

Q = 75

 VAIC

1.07

1.39

2.84***

3.37***

 DVAIC

2.26**

2.85**

3.89***

4.51***

 Adj R2

0.5874

0.5359

0.5414

0.4895

Model 6

RC

Q = 25

Q = 50

Q = 75

 VACA

5.51***

2.83***

9.45***

7.21***

 DVACA

0.23*

0.49

0.82

0.37**

 Adj R2

0.5972

0.5284

0.5652

0.5641

Model 7

RC

Q = 25

Q = 50

Q = 75

 VAHU

1.27

1.48

2.16**

3.31

 DVAHU

2.29**

2.62**

3.13***

4.68***

 Adj R2

0.5605

0.5343

0.5325

0.4814

Model 8

RC

Q = 25

Q = 50

Q = 75

 STVA

1.47

2.21

1.95

1.41

 DSTVA

2.24

1.85

2.59

1.88

 Adj R2

0.5759

0.5231

0.5217

0.4694

  1. VAIC value-added intellectual capital, VACA value-added capital assets, VAHU value-added human capital, STVA structure capital value added, DVAIC dummy value-added intellectual capital coefficient, DVACA dummy value-added capital assets, DVAHU dummy value-added human capital, DSTVA dummy structure capital value added
  2. *P value < 10%; **P value < 5%; and ***P value < 1%