The survey is formed by a sample survey on legal units with less than 250 persons employed (SME) and a total survey on legal units with 250 or more persons employed (SCI) and answers to the request of SBS EU Council Regulation n. 2019/2152. The field of observation is represented by the legal units of business register on active enterprises (Asia) in the reference year. The main variables collected annually by an electronic questionnaire regard business accounting, employment, personnel cost and investments. The data collected is treated by statistical procedures for assuring consistency and coherence and non-response technique, by integrating data from administrative sources. The classification of economic activities corresponds to Ateco 2007 or Nace Rev.2.
The SME survey uses a random sampling design stratified by economic activity, size classes of persons employed and administrative regions. The estimation methodology is based on calibration, by using known totals from the business register (the number of the persons employed and legal units).
The SCI survey, in addition to collecting information on the legal units, also collects data by KAU (Kind of Activity Unit) of the legal unit itself.