A recent Norwegian study shows how difficult it is for migrants to find a sustainable source of income:

The main message coming out of our longitudinal analyses is that the labor market integration of immigrants from low‐income countries tends to lose steam after just a few years in Norway, and that the integration process then goes into reverse. After five to ten years of residence, virtually all immigrant groups from low‐income countries – regardless of gender and admission class – experience declining employment rates and increasing social insurance dependency rates relative to natives with shared characteristics.

Interesting as it is, let us draw that other conclusion that the authors, as usual, simply turn a blind eye to:

Whites are much more likely to integrate than non-whites.

As the following table shows, migrants from Bosnia and Kosovo are clearly better able to keep jobs and avoid welfare than migrants from Eritrea, Iran, Iraq, and Somalia (Afghan males are more likely to keep jobs and less dependent on welfare than male Bosnians and Kosovars, but the pattern is reversed for Afghan females):

Just as obvious, all the countries in the list are predominantly Muslim. This is consistent with the fact that Muslim migrants tend to become more radicalized over time, and seems to support the notion that other things being equal, whiteness is a strong determinant of ease of integration among migrants.