2011年-世界发展银行全球_Eight_Questions_about_Brain_Drain_30页_1mb

Summary of "Eight Questions about Brain Drain"

Core Content

This paper addresses eight key questions related to the phenomenon of brain drain, focusing on the migration of high-skilled individuals from developing to developed countries. It aims to provide a nuanced understanding of brain drain by examining empirical evidence and challenging common assumptions.

Main Questions and Key Findings

1. What is Brain Drain?

• Definition: Brain drain refers to the emigration of a country's most highly skilled individuals, particularly those with university training.
• Common Occupations: While medical professionals are often highlighted, they represent only 12-15% of educated immigrants. Other skilled professions like computer specialists, accountants, managers, scientists, and academics are more prevalent.
• Education Level: The brain drain rate for tertiary-educated individuals is significantly higher than for those with only primary or secondary education.

2. Why Should Economists Care About Brain Drain?

• Policy Concern: Brain drain is a major policy concern in many countries, with thousands of news articles annually discussing its impact.
• Labor Mobility Barriers: International migration is affected by significant labor mobility barriers, leading to large income disparities between countries.
• Externalities: The paper highlights the importance of production and fiscal externalities, such as the potential negative impact on unskilled workers and the fiscal cost of losing skilled individuals.
• Immigrant Contribution: Immigrants, especially from developing countries, constitute a significant portion of the skilled labor force in many developed countries.

3. Is Brain Drain Increasing?

• Absolute Increase: Skilled migration has increased, especially from less developed to more developed countries.
• Relative Stability: The brain drain rate (relative to the total tertiary-educated population) has remained stable globally, but sub-Saharan Africa is an exception due to low tertiary education growth.
• Tertiary Enrolment: Tertiary education enrolment rates have risen in many developing countries, but skilled worker intake in OECD countries has remained flat or declined.

4. Is There a Positive Association Between Skilled and Unskilled Migration?

• Empirical Evidence: There is a strong positive association between skilled and unskilled migration.
• Granger Causality: Analysis shows that increases in skilled migration predict increases in unskilled migration, and vice versa.
• Family Reunification: One mechanism for this association is family reunification, where unskilled family members accompany skilled migrants.

5. What Makes Brain Drain More Likely?

• Macro Level: Smaller countries, those with political instability, and countries with low human capital tend to experience higher brain drain.
• Income Gaps: Large income gaps between sending and receiving countries drive migration, but not all high-skilled individuals emigrate.
• Micro Level: Career opportunities, lifestyle, and family considerations play a significant role in migration decisions, alongside income.

6. Does Brain Gain Exist?

• Theoretical Framework: Brain gain theories suggest that high-skilled emigration can increase human capital in the home country by raising incentives for education.
• Empirical Evidence: Case studies show that changes in migration opportunities or returns can lead to increased education levels in the home country.

Key Information

• Data Sources: The paper uses data from the American Community Survey, OECD, and national censuses to analyze migration patterns.
• Brain Gain Examples:
  • Shrestha (2010) found increased education completion rates in Nepal due to changes in Gurkha recruitment policies.
  • Chand and Clemens (2008) observed increased education levels among Indo-Fijians after a coup in Fiji.
  • Docquier et al. (2010) noted increased skill levels in African soccer leagues following the Bosman ruling.
• Policy Implications: The paper suggests that brain drain is not always a net loss and that there may be significant benefits to sending countries, especially in terms of remittances, investments, and knowledge transfer.

Conclusion

• The paper provides a comprehensive analysis of brain drain, emphasizing the need for evidence-based discussions.
• It highlights the complexity of brain drain, showing that it is not solely a negative phenomenon and that it can have positive effects.
• The findings suggest that policymakers should consider the broader implications of skilled migration, including potential brain gain and the interplay with unskilled migration.