This collection of papers derives from the multidisciplinary workshop of young researchers which took place in Louvain-la-Neuve on 11-13 June 2003. It is based on actual case studies in the sectors of transport, data-processing and telecommunications between the 1950s and the 1980s. It analyses the long and difficult process for those involved in building
expertise in the new field of an integrated Europe. At the same time as firms discovered the importance of influencing the decision-making process at work, they were given a place in this participative process. This new role implies the accumulation of enlarged technical competencies and the multiplication of contacts with other economic actors. Together, they have taken part in the demarcation of the Community framework, though the elaboration of technical standards, tax harmonisation, state aids regulation, and so on, and have defended their interests in this framework as best they could. This could provoke strong opposition, which was difficult to overcome. In this case, a process of learning and understanding was necessary on both sides in order to advance Community harmonisation.