• Data reference period (Month)
• Geographic localization (Mainland)
• Sex

• 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.
• EARNING:  Regular net amount in cash or in kind paid to the worker over a given reference period, by virtue of time spent working or work supplied during normal and extra working hours. Includes payment of hours paid but not worked (holidays, bank holidays and other paid absences from work).
• 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).
• SEX:  Biological and physiological characteristics that define men and women.

The average hourly earnings is calculated by: Sum Xh(RBm+SBm+TSm)/ HRm, where m is a generic index defined by intersection of the occupational level variable and sex variable, RB is the total basic remuneration paid to TCO, SB is the total regular bonuses and allowances/grants paid to TCO, TS is the total overtime remuneration paid to TCO, TCO is the number of employees, HR are the monthly hours paid to TCO, Xh is the estimator of the total defined in paragraph 28 of the methodological document Earnings and working hours survey.