Data source(s) used: The 19th October 2011 Istat released the new annual series of national accounts based on the most updated versions of the classification of economic activities (Ateco 2007, the national version of Nace Rev. 2) and of products by activity (CPA 2008). 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).Compensation of employees, wages and salaries and social security contributions:Compensation of employees (D1) is defined as the total remuneration, in cash or in kind, payable by an employer to an employee in return for work done by the latter during the accounting period. Compensation of employees is broken down into: wages and salaries (D11): wages and salaries in cash; wages and salaries in kind; employers’ social contributions (D12): employers’ actual social contributions (D121); employers’ imputed social contributions (D122).Gross value added: Gross value added is the value of output less the value of intermediate consumption; it is a measure of the contribution to the economic growth in terms of new goods and services available for final consumption.Gross value added at basic prices: Gross value added at basic prices is output valued at basic prices less intermediate consumption valued at purchasers’ prices. The basic price is the amount receivable by the producer from the purchaser for a unit of a product or service minus any tax on the product plus any subsidy on the product.