This is true even after accounting for other differences, such as parental education. Educational differences are also found to be smaller for children of immigrants than new immigrants, which they argue suggests that the education system is working to assimilate immigrant youth. In the United States, Card (2005) finds no evidence of unskilled immigration having a negative impact on unskilled native workers’ labour market performance, suggesting that concerns that immigration may increase poverty among the native population are ill-founded.