The article discusses how immigration policies can impact the skills of immigrants coming into a country. When policies restrict low-skilled immigrants, it can lead to a less skilled immigrant population overall. This can influence the skill distribution in the receiving country. The study suggests that understanding why people choose to migrate is important for shaping immigration policies. Even if current immigrants are not harmful, some natives may still support stricter policies. This means that immigration restrictions may be seen as beneficial, even in a purely practical sense.