AP® Human Geography review sheet from Aim for Five (aimforfive.com/geo/units/2/2-12)
Unit 2 · Topic 2.12
2.12 Effects of Migration
Migration changes both the place people leave and the place they go. The effects are economic, political and cultural, and they can be positive and negative at the same time.
Key terms
- remittances
- brain drain
- brain gain
- ethnic enclave
Economic effects
For the origin country, the biggest benefit is remittances, money migrants send home to family. The World Bank estimates remittances to low- and middle-income countries topped $600 billion in 2024. India is the largest recipient, and in some countries, like Tajikistan and Nepal, remittances equal a large share of the whole economy, more than a third of GDP in Tajikistan. Remittances pay for food, school fees, housing and small businesses.
The main cost is brain drain, the loss of educated or skilled workers like doctors, nurses and engineers. Many nurses trained in the Philippines and doctors trained in Nigeria work abroad. The receiving country gets a brain gain. Some migrants later return with new skills and money, which is sometimes called brain circulation.
For the destination, migrants fill jobs in fields from farming and construction to health care and tech, start businesses and pay taxes. Economists debate how immigration affects wages for workers already there; the effects vary by place, industry and time period.
Political effects
Migration shapes immigration laws, border enforcement, citizenship rules and refugee policy. It is a major topic in elections in the U.S. and Europe, where people disagree about how many migrants to admit, how to handle unauthorized migration and how to support integration. Migrants can also gain political influence, as immigrant communities become voters and some home countries let citizens abroad vote in their elections.
Cultural effects
Migrants bring their languages, religions, foods and traditions, and they often cluster in ethnic enclaves, neighborhoods where one immigrant group is concentrated. Examples include Chinatown in San Francisco, Little Havana in Miami and the Turkish neighborhoods of Berlin. Enclaves offer support, jobs and familiar shops, and they reshape the cultural landscape with new places of worship, signs in other languages and restaurants.
Over time, cultures mix. Migrants may keep some traditions and adopt others, and the host culture adopts traits from migrants too (topic 3.8).
Demographic effects
- Destinations get younger, because most migrants are young adults, which can slow population aging.
- Origins can become older and lose working-age people, especially in rural areas.
- Sex ratios shift: when mostly men leave, as in parts of Kerala, India, for work in the Gulf, many households are run by women.
- Migrants may have higher birth rates at first, which tend to move toward the host country's rates over a generation or two.
Worked examples
Try each one yourself first, then open the solution.
- Example 1
Explaining an effect on the origin country
Explain one positive and one negative economic effect of emigration on the country migrants leave.
Show the solutionHide the solution
- Step 1: Positive: migrants send remittances home, which raise household incomes and pay for schooling, housing and small businesses.
- Step 2: Negative: when skilled workers like nurses and doctors leave, the origin country suffers brain drain, losing the return on the education it paid for and weakening services such as hospitals.
- Step 3: Keep each effect tied to the origin country, since that's what the question asks about.
Answer: Positive: remittances raise family incomes and fund education and businesses at home. Negative: brain drain removes skilled workers like doctors and nurses, weakening services the country invested in.
Common mistakes
- Describing effects without saying where. Make clear whether an effect is on the origin or the destination.
- Treating brain drain and brain gain as different events. They are two sides of the same flow of skilled workers.
- Taking a side on immigration debates. Describe the arguments and effects neutrally.
On the exam
- Free-response questions often ask for one political, one economic and one cultural effect of migration; label each one.
- Use ethnic enclaves as evidence of cultural effects on the landscape, and remittances as evidence of economic effects on the origin.
Connected topics
Videos
Check yourself
4 questions on 2.12 Effects of Migration. Pick an answer to see if you got it, and why.
| Country | Remittances received (billions of US$) | Remittances as a share of GDP (%) |
|---|---|---|
| Country S | 2.1 | 9 |
| Country T | 4.8 | 38 |
| Country U | 11.0 | 6 |
| Country V | 60.5 | 3 |
| Country W | 0.9 | 22 |
Hypothetical data for one year
Based on the table, which country's economy depends most heavily on remittances?
Which of the following is a likely positive effect of remittances on Country T?
Which of the following is a likely drawback for a country whose economy relies heavily on remittances?
A low-income country trains many doctors, but a large share of them move to wealthier countries for higher pay soon after finishing their training. For the home country, this is an example of
0 of 4 answered