The survey is carried out over a random sample stratified by: class of employees (1-2; 3-5; 6-999; 1000 or more); geographic division (... [more]

The survey is carried out over a random sample stratified by: class of employees (1-2; 3-5; 6-999; 1000 or more); geographic division (North-west; North-east; Centre; Mezzogiorno) and main kind of economic activity (45.1 - sale of motor vehicles; 45.2-45.4 - maintenance of motor vehicles and sale of eccessories; 47.1,47.2 - retail trade of food, beverages, tobacco; 47.3 - retail trade of automobile fuel; 47.4-47.7 - retail trade of other goods). The sampling, which does not resort to any kind of selection cut-off entry, provides a random draw for companies with a staff of fewer than 1000 and an insertion census for all units with 1,000 and more employees. [back]

The survey is carried out on a stratified sample of 1000 firms. The criteria used for strata are: the economic sectors (divisions 45 an... [more]

The survey is carried out on a stratified sample of 1000 firms. The criteria used for strata are: the economic sectors (divisions 45 and 47 of Ateco 2007); the geographical area (North West, North Ovest, Centre, Mezzogiorno), the type of distribution (Large scale distribution and Small and medium scale distribution). The number of units in each stratum is proportional to that of firms in the retail trade sector with three or more employees that are in the archive Asia. [back]