Since the principles and implementation methods of extension need to comply with economic and social characteristics of the country, in-tervievvees were selected among persons who have conducted long-last-ing studies about the unionisation and collective bargaining system of our country and have alvvays been able to identify what needs to be done in this area as jurists. Therefore it was ensured that they contributed in our recommendations about the extension system in line with the con-ditions of our country. Interview questions and responses are presented under the section on recommendations for our country.

In addition to intervievvs and substantive legislations of countries, comparative reports and studies on OECD countries, extension related regulations in EU Member States and results and development of these as well as the socio-economic conditions of our country wereuated together and as a result, an extension system proposition vvas developed which vvas believed to be effective and accurate for our country.