For this reason, this chapter does not focus on this summaiy indicator. The new methodology relies more intensively on a direct reading and interpretation of legislation, collective bargaining agreements, and case law under the responsibility of the OECD Secretariat. Moreover, collective agreements and case law have been more systematically included, and a greater effort has been made to ensure that the same scoring criteria are applied to all countries (see Box 2.1 for details). The implementation of the new data-collection and harmonisation procedures led to a number of revisions in historical data for the detailed components.