• Data reference period
• Geographic localization (Portugal)
• Population type

• REFERENCE PERIOD:  The length of time for which data are collected, e.g. a specific day, month or year.
• HOUSEHOLD NET MONETARY INCOME:  Monetary income received by the household as a whole and by each of its members, from work (employee income and income from self-employment), from other private income sources (capital and property income, private transfers received) and from pensions and other social transfers, net of income taxes and social security contributions.
• RESIDENT POPULATION:  Set of persons who, regardless of being present or absent in a given housing unit at the moment of observation, have lived in the place of their usual residence for a continuous period of 12 months prior to the moment of observation, or have arrived to the place of their usual residence during the period of 12 months prior to the moment of observation, with the purpose of living there for a year, at least.

Yt = Yt-n * π(0; n-1)  (1+ ∆ Yt / Yt-1)

where:

Y -  Five-year average growth rate of the mean equivalent net monetary income in real terms;

t - last year of the interval;

t-n - first year of the interval;

n- number of years of the interval;