GDP is the standard measure of the value of the production activity (goods and services) or resident producer units. Values of the GDP in the metropolitan areas are estimated by adjusting the GDP values of TL3 regions.
To make comparisons over time and across countries, GDP is expressed at constant prices (year 2005) and converted into USD purchasing power parities (PPPs) to express each country’s GDP in a common currency. GDP per capita is the ratio between GDP and population in a metropolitan area.
Employed persons are all persons who during the reference week worked at least one hour for pay or profit, or were temporarily absent from such work. Values of employed in the metropolitan areas are estimated by adjusting the corresponding values of TL2 regions.
The urban population in a country is given by the national population residing in functional urban areas.
OECD metropolitan areas areas
OECD functional urban areas are defined as densely populated municipalities (urban cores) and adjacent municipalities with high levels of commuting towards the densely populated urban cores (hinterland). Functional urban areas can extend across administrative boundaries, reflecting the economic geography of where people actually live and work. A minimum threshold for the population size of the functional urban areas is set at 50 000. Metropolitan areas are here defined as functional urban areas with a population above 500 000 people. There are 275 metropolitan areas in the 29 OECD countries examined; of these, 77 have a population greater than 1.5 million.
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