Integration through acquisition of citizenship has become an important topic in many EU Member States in recent years, as the number of new migrants arriving in the EU has increased in recent years. The EMN study found that citizenship is seen by Member States as either the culmination of the integration process or as facilitating the integration process. However, in most Member States, third-country nationals are not actively encouraged to apply for citizenship. 

In 2003, the Council adopted the Long-Term Resident Directive 2003/109/EC in order to promote the integration of third-country nationals in legal stay in the EU. Fourteen years after its entry into force, EMN Luxembourg conducted a study on the implementation of the Directive in 23 EU Member States, including Belgium.