•Immigrants have higher life expectancy at age 1 than the native-born in Denmark, Finland and Norway do from 1990 to 2019.•Immigrants in Denmark, Finland and Norway increasingly enhance national life expectancy at age 1 over time.•Immigrants in Sweden have lower life expectancy at age 1 than native-born in Sweden do in 1990, but similar levels by 2019.•The effect of immigrants on national life expectancy at age 1 in Sweden transforms from negative to positive over time.•The unique mortality of immigrants affects rankings of life expectancy at age 1 in the Nordic region in recent years.
Keywords: MMA, Migrant Mortality Advantage; PLE, Period Life Expectancy; US, United States.
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