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

• REFERENCE PERIOD:  Period to which the information refers and which may be a specific day or a time interval (month, fiscal year, calendar year, among others).
• EMPLOYEE:  Person who carries out an activity under the authority and direction of another under the terms of an employment contract, whether or not subject to written form, which entitles him/her to a remuneration that does not depend on the results of the economic unit for which he/she works.
• 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.
• EMPLOYED:  Person aged 15 years or over who during the reference period was in one of the following situations: 1) worked for at least one hour for a wage or salary, in cash or in kind; 2) had a formal attachment to his/her job, but was not at work, temporarily; 3) had an enterprise, but was not at work, temporarily, for any specific reason; 4) was in early retirement, but working in the reference period.

(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