An excellent article reporting on the economic and criminal effects of immigration on Denmark.

Summary:

- Non-Western (i.e. non-White) immigrants and their descendants have a net negative economic impact and commit a hugely disproportionate amount of crime.

- Even after controlling for age and sex, the conviction rates of Denmark's most criminally inclined ethnic groups are more than six times higher than those of native Danes.

- White immigrants make a net positive economic contribution, comparable to that of native Danes, while committing slightly less crime.

Source: The Effects of Immigration in Denmark by Patterns in Humanity