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Description of control and outcome variables used in the analyses.
| % | Mean | S.D. | N of observations | |
| Gender: % female | 51.6% | – | – | 68,268 |
| Age (average years) | – | 24.5 | 1.9 | 68,398 |
| Migration background (%): | 66,914 | |||
| Native Dutch | 89.2% | – | – | |
| Non-western migration background | 4.9% | – | – | |
| Western migration background |
5.9% | – | – | |
| Region of work (%) | 66,920 | |||
| North | 8.1% | – | – | |
| East | 20.6% | – | – | |
| West | 48.6% | – | – | |
| South | 22.7% | – | – | |
| Hourly earnings (average 2017 euros) | – | 14.83 | 3.02 | 61,609 |
