Four types of questionnaires are available: industrial and service firms (20-49 employees and 50 employees or more). The firms with 20-49 employess have been interviewes since 2001, the service firms since 2002.

The questionnaires accessible through this link also shows the variable names that can be found in the archives.

Starting from 2003, the names of the variables introduced for the first time are written in red, while the variable codes already present in past editions are written in black.

The questionnaires are available from the 1988 survey. However, the available database contains the surveys from 1984. Instructions for the questionnaires are available from 1996 only.

Please note that the variables which can identify the respondents are not available.