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Whereas the impact on the average native tends to be small and positive, studies show more mixed results for low-skilled natives, but whether the effects are positive or negative, they tend to be small either way. [16] [17] Research has also found that migration leads to greater trade in goods and services. [18]
Human migration is the movement of people from one place to another, [1] with intentions of settling, permanently or temporarily, at a new location (geographic region). The movement often occurs over long distances and from one country to another (external migration), but internal migration (within a single country) is the dominant form of human migration globally.
As for economic effects, research suggests that migration is beneficial both to the receiving and sending countries. [5] [6] [7] Research, with few exceptions, finds that immigration on average has positive economic effects on the native population, but is mixed as to whether low-skilled immigration adversely affects underprivileged natives.
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Some research suggests that immigration is beneficial to the United States economy. With few exceptions, the evidence suggests that on average, immigration has positive economic effects on the native population, but it is mixed as to whether low-skilled immigration adversely affects low-skilled natives.
This means that immigrants make a positive contribution to fitness over and above the demographic effects of simply adding more individuals, by bringing novel alleles to the population. This rescue effect is most likely to occur if the recipient population is small, isolated, and suffering from inbreeding depression. [12]
The positive effects of human capital flight are sometimes referred to as "brain gain" whereas the negative effects are sometimes referred to as "brain drain". According to economist Michael Clemens , it has not been shown that restrictions on high-skill emigration reduce shortages in the countries of origin. [ 33 ]
Net migration rates per 1,000 people in 2023. The net migration rate is the difference between the number of immigrants (people coming into an area) and the number of emigrants (people leaving an area) divided by the population. [1] When the number of immigrants is larger than the number of emigrants, a positive net migration rate occurs.