Résumé
In most policy process research, policy change is analyzed as a consequence of exogenous factors, thereby reducing the resistance of actors favoring stability, especially veto players (Tsebelis 2002). In the 1970s and 1980s the question of decision making disappeared from the research agenda to let the broader issues concerning the policy process (from agenda setting to implementation) and policy change take its place. Thus, in the analysis of policy change, two orientations became dominant. The first was to stress the role of exogenous variables (i.e., economic, knowledge-oriented, technological, political, and international contexts) in order to explain changes in the policy process. The second was to focus on the constraints that limit policymakers in their capacity to influence policy