In the case of institutional differences between sectors, responses focus on what is applicable in the agreement that applies to the manufacturing sector (in the case of differences within the manufacturing sector for metallurgists). Unless otherwise indicated, the information in this chapter refers to the economy as a whole, although the actual application and use of some instruments may vary from sector to sector. The questionnaire sent to ministries of labour focused on: (i) the architecture of collective bargaining (e.g. B the structure of collective bargaining, hierarchy between levels, wage coordination, use of extensions, derogations, duration of agreements, etc.); (ii) Industrial relations at the enterprise level (e.B.