The Economic Survey of the Professional and Business Services Sector operation (SPE) gives information on the economic structure of the different sub-sectors of the Professional and Business Services of the Basque Country and of each province; it contributes to the production of the Economic Accounts, Input - Output Tables, and allows the calculation of the sector macro-figures. The information is provided by establishments whose exclusive or main activity is included in one of the categories within the National Classification of Economic Activities indicated in the methodology file.