Data source(s) used: The 3th October 2014 Istat released the new annual series of national accounts based on the new European System of Accounts (ESA 2010). At the same time, as in other European countries, the time series of national accounts have been subjected to an extraordinary revision, exploiting advances in methods and sources (e.g. the new balance of payments estimates issued by the Bank of Italy based on the new manual BPM6).Labour input: the main definitions on labour inputs (ESA2010) concern persons employed, jobs and full time equivalent. In the system of national accounts, these concepts are defined on the base of economic territory and centre of interest. Labour inputs have to be classified on the base of the economic activity unit at local level and of the institutional unit. The Italian approach to the labour inputs estimates allows to calculate the jobs and the corresponding full time equivalent, that represent the transformation to full-time of jobs for different working categories (registered, unregistered, main, multiple) detectable by integrating and comparing different statistical sources or by using indirect estimating methods.Population:According to national accounts, the total population on a given date consists of national or foreign persons settled permanently in the economic territory of Italy, even if they are temporarily absent from it. A person who is staying, or intends to stay, on the economic territory of the country for one year or more is regarded as permanently settled there. A person is regarded as being temporarily absent if he or she is permanently settled in the country but is staying, or intends to stay, abroad for a period of less than one year. An annual average of head counts provides an appropriate basis for international comparisons and it is used as denominator of per capita values of important aggregates as GDP, gross national income, final consumption expenditure of households.For the years 2002- 2013, the average annual population used in national accounts is not the legal population but it has been obtained by a statistical reconstruction (“Ricostruzione statistica delle serie regionali di popolazione del periodo 1/1/2002 – 1/1/2014” http://www.istat.it/it/archivio/145206) disseminated on January 2015 and used as a reference for the main macroeconomic aggregates and indicators. The statistical reconstruction of population by regions was carried out in order to avoid the effects of changes in the population count mainly due to administrative purposes and that produce an adjustment of the population register after the Census. In particular, the revision of the population register after the 2011 Census of Population was due to the re-registration in 2012 of persons cancelled from the register according to the census results and to the recovery in 2013 of persons actually resident in the municipality but not surveyed by the population census; these phenomena caused a sudden increase of the legal population after the census year.From 1 January 2014 onwards, data have been aligned to the results of the following demographic surveys: "Surveys on the movement and calculation of the resident population" and "Surveys on the age structure of the resident population".