• Data reference period (Quarter)
• Geographic localization (Portugal)

• 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).
• ECONOMIC TERRITORY:  Economic territory means: (a) the geographic territory administered by a government within which persons, goods, services and capital move freely; (b) any free zones, including bonded warehouses and factories under customs control; (c) the national air-space, territorial waters and the continental shelf lying in international waters, over which the country enjoys exclusive rights; (d) territorial enclaves (i.e. geographic territories situated in the rest of the world and used, under international treaties or agreements between States, by general government agencies of the country (embassies, consulates, military bases, scientific bases, etc.)); (e) deposits of oil, natural gas, etc. in international waters outside the continental shelf of the country, worked by units resident in the territory as defined in the preceding subparagraphs.
• GROSS DOMESTIC PRODUCT AT MARKET PRICES (GDPmp):  Gross domestic product at market prices is the final result of the production activity of resident producer units. It can be defined in three ways: 1) GDPmp is the sum of gross value added of the various institutional sectors or the various industries plus taxes and less subsidies on products (which are not allocated to sectors and industries). It is also the balancing item in the total economy production account; 2) GDPmp is the sum of final uses of goods and services by resident institutional units (actual final consumption and gross capital formation), plus exports and minus imports of goods and services; 3) GDP is the sum of uses in the total economy generation of income account (compensation of employees, taxes on production and imports less subsidies, gross operating surplus and mixed income of the total economy). By deducting consumption of fixed capital from GDP, we obtain net domestic product at market prices (NDPmp).

Quotient of the value of the last period, by the value of the identical period of the previous year.