• Data reference period
• Place of residence (Portugal)
• Highest completed level of education

• 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).
• EDUCATIONAL QUALIFICATIONS:  The degrees, diplomas, certificates, professional titles and so forth that an individual has acquired by study.
• LABOUR UNDERUTILIZATION:  Indicator that aggregates the unemployed population, the underemployment of part-time workers, the inactive seeking work but not immediately available and the inactive available but not seeking work.
• EXTENDED LABOUR FORCE:  Labour force enlarged by the inactive seeking work but not immediately available and the inactive available but not seeking work.

Labour underutilization rate = (Labour underutilization/ Extended labour force)*100