Table 2 Multicollinearity test

Year 1997

3.31

0.30

Year 1996

3.28

0.31

Year 1993

3.10

0.32

Year 1998

3.09

0.32

Year 1992

3.05

0.33

Year 1994

2.99

0.33

Year 1995

2.99

0.33

Year 1991

2.69

0.37

Year 1990

2.50

0.40

Diversification

2.27

0.44

Year 1999

2.15

0.46

Knowledge depth

1.50

0.67

Search depth

1.47

0.68

Knowledge scope

1.44

0.69

Technological opportunities

1.42

0.70

Performance

1.08

0.93

Research size

1.04

0.96

Demand growth

1.03

0.97

Mean VIF

2.20