The individual and collective actions of (potential) migrants are produced in the past and present under various conditions of control—steering, categorization and regulatory undertakings—in the development and partial implementation of which various actors are involved. The contingent characteristics, contexts and developments of these attempted influences and their interactions with the actions and decisions of migrants are the subject of this research area, defined as 'migration regimes.' Researchers in this area seek to address questions such as: Who observes, influences and produces which migrations? What are their consequences? Why? How?