The think tank said the findings challenge claims that migration drives crime and should be restricted.
"That's why we conducted an extensive study of the factors influencing crime among foreigners," it said.
After reviewing migration strategies and analyzing economic and social indicators in more than 30 countries, the Warsaw Enterprise Institute said it found that in some nations an influx of "social migrants" is linked to higher crime rates.
In Germany, foreigners made up about 17 percent of the population in 2024 but were responsible for more than 40 percent of all crimes, the report said.
In Sweden, immigrants accounted for 20 percent of the population in 2023 and 37 percent of prisoners.
By contrast, in Poland, which has a less generous social welfare system, foreigners make up roughly 6.6 percent of the population, are responsible for about 5 percent of crimes, and represent 4.2 percent of inmates, according to the Warsaw think tank.
The organization said immigration brings both opportunities and challenges and called for "responsible" migration policies.
"We oppose the idea of closing the borders and see opening them to legal newcomers as a beneficial solution," it said, adding that a well-planned approach to immigration can support economic growth as Poland confronts demographic pressures.
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Source: pap-mediaroom.pl