| GDP | Gross domestic product |
| HPWP | High performance work practices |
| ICT | Information and Communication Technologies |
| ISCED | International Standard Classification of Education |
| ISCO | International Standard Classification of Occupations |
| NEET | Neither in employment nor in education or training |
| OLS | Ordinary Least Squares |
| PIAAC | Survey of Adult Skills |
| PPP | Purchasing power parity |