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Correlation test results of innovation indicators.
| Variable | Internal expenditure of R&D | External expenditure of R&D | New products development expenditure | Full-time equivalent on R&D personnel |
|---|---|---|---|---|
| Sales revenue of new products | 0.987∗∗∗ | 0.949∗∗∗ | 0.985∗∗∗ | 0.959∗∗∗ |
| Number of patent applications | 0.906∗∗∗ | 0.881∗∗∗ | 0.912∗∗∗ | 0.917∗∗∗ |
∗∗∗ p < 0.01.
