• Data reference period
• Geographic localization (NUTS - 2013)

• EMPLOYED:  All persons aged 15 or over who during the reference period were in the following categories: 1) persons who performed some work for a wage or salary, in cash or in kind; 2) persons who, having already worked in their present job, were temporarily not at work and had a formal attachment to their job; 3) persons with an enterprise, who were temporarily not at work for any specific reason.; 4) persons who were offered early retirement, but were working in the reference period.
• REFERENCE PERIOD:  The length of time for which data are collected, e.g. a specific day, month or year.
• LOCAL UNIT:  An enterprise or part thereof (e.g. a workshop, factory, warehouse, office, mine or depot) situated in a geographically identified place. At or from this place economic activity is carried out for which ' save for certain exceptions ' one or more persons work (even if only part-time) for one and the same enterprise.
• EMPLOYEE:  Those jobs where the incumbents hold explicit (written or oral) or implicit employment contracts which give them a basic remuneration which is not directly dependent upon the revenue of the unit for which they work.

(Difference between employed population inflow and outflow between year n - 1 and year n/ Average number of employed population between year n - 1 and year n)*100