Freedom of association and the right to collective bargaining are at the heart of decent work. They are fundamental rights at work and are the basis for healthy labour relations and effective social dialogue. Data and indicators on trade union membership and the scope of collective agreements, as well as other qualitative indicators, are important for monitoring progress in the effective implementation of these rights in the workplace. Measuring these social dialogue indicators is also essential to assess the quality of labour relations and their impact on employment and working conditions. The data can be accessed through the OECD Data Warehouse OECD “The aim of this document is to fill several gaps in the content of collective agreements using a new online database.