https://phys.org/news/2018-07-refugees.html

Some research suggests that it depends on how well refugees are able to integrate into their host country. Refugees and other migrants coming to Germany, for example, are required to take integration courses – 600 hours of German language classes, as well as 100 hours of classes that cover the German legal system, history and culture.

According to the Migrant Integration Policy Index 2015, which uses numerous indicators to measure how much migrants are participating in society, Germany is doing very well. This is particularly true of integrating migrants into the German workforce.