Number of explanatory variables in each group
| Group of explanatory variables | 2018 | 2016 | 2014 | 2012 | 2010 | No. of common variables in 2010–2018 |
|---|---|---|---|---|---|---|
| Strategy | 16 | 12 | ||||
| Work organization | 5 | 1 | 1 | 2 | 2 | |
| Customers and suppliers | 1 | 1 | 3 | 2 | ||
| External collaboration | 11 | 3 | 3 | 10 | 10 | |
| Innovation activity | 5 | 5 | 5 | 5 | 5 | 4 |
| Technology | 6 | 2 | 2 | 2 | 2 | 1 |
| Financial incentives | 6 | 4 | 4 | 4 | 4 | 2 |
| Turnover | 5 | 2 | 4 | 2 | 2 | 2 |
| Market scope | 8 | 10 | 10 | 8 | ||
| Marketing | 2 | 2 | 2 | 2 | 2 | |
| Company characteristics | 21 | 20 | 20 | 22 | 18 | 17 |
| Other expenditure | 2 | 2 | 2 | 2 | 1 |
| Group of explanatory variables | 2018 | 2016 | 2014 | 2012 | 2010 | No. of common variables in 2010–2018 |
|---|---|---|---|---|---|---|
| Strategy | 16 | 12 | ||||
| Work organization | 5 | 1 | 1 | 2 | 2 | |
| Customers and suppliers | 1 | 1 | 3 | 2 | ||
| External collaboration | 11 | 3 | 3 | 10 | 10 | |
| Innovation activity | 5 | 5 | 5 | 5 | 5 | 4 |
| Technology | 6 | 2 | 2 | 2 | 2 | 1 |
| Financial incentives | 6 | 4 | 4 | 4 | 4 | 2 |
| Turnover | 5 | 2 | 4 | 2 | 2 | 2 |
| Market scope | 8 | 10 | 10 | 8 | ||
| Marketing | 2 | 2 | 2 | 2 | 2 | |
| Company characteristics | 21 | 20 | 20 | 22 | 18 | 17 |
| Other expenditure | 2 | 2 | 2 | 2 | 1 |
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