• Data reference period
• Geographic localization (NUTS - 2002)

• 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).
• 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.
• EMPLOYEES:  Employees are defined as all people who work under the terms of a contract for a resident institutional unit, receiving remuneration in return.

(Number of employees with higher education/ Number of employees)*100