The 5th extended and updated version of the ICTWSS database is available

The current version 5.0 covers 51 countries, nearly 200 variables and 55 years (1960-2014). The biggest changes between version 5.0 of the database and the previous version 4.0, released in April 2013, are in the sections on wage setting and bargaining coverage This version of the database has new estimates on collective bargaining coverage rates in the private and public sector, adjusted for those employees whose conditions are set by government mandate, as well as on the division between enterprise and sector bargaining, and the extra-contractual coverage of workers through agreements that are extended to non-organized employers. In addition to the dominant level of bargaining, defined as the level at which most agreements apply, a new set of variables tries to capture the actual level of bargaining over wages and working hours through a new set of variables:

  • the frequency or scope of additional of enterprise bargaining in the market sector within the framework of sectoral or cross-sectoral agreements;
  • the articulation of multi-level bargaining;
  • the legal or contractual basis for derogation;
  • general opening clauses in sectoral agreements, and
  • crisis-related hardship clauses in agreements of any type.

Combining this information a new variable on the actual degree of centralisation of wage bargaining has been created.

Please cite the database as:
J. Visser, ICTWSS Data base. version 5.0. Amsterdam: Amsterdam Institute for Advanced Labour Studies AIAS. October 2015.
Open access database at:

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