Controversial study claims migration rises as poorest countries get richer

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A controversial study is claiming that migration rises as the poorest countries get richer.

The findings go against the commonly held belief that richer people prefer to stay in their countries, where they get the highest benefits, rather than travel to a land of uncertainty.

For instance, it is widely believed that people living in the United States would hardly relocate to poorer countries unless they determine that they would enjoy greater benefits there.

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However, the contentious new research released by the Washington DC-based Center for Global Development (CGD) concluded that governments’ attempts to assist overseas development in order to curb migration does not work.

According to the study, development does not immediately deter migration, and those who migrate are not among the world’s poorest.

The new research from Michael Clemens and Mariapia Mendola says migration is seen as an investment, as migrants are better-educated and richer than others.

The two new sweeping studies calculate the effects of rising income on emigration for both poor countries and poor individuals.

The first paper, by Michael Clemens, analyzed the relationship between real gross domestic product (GDP) per capita and net emigration rates in developing countries. The second, by Clemens and co-author Mariapia Mendola, examined nationally representative survey data on 653,613 people in 99 developing countries to see who migrates, when, and how.  

The researchers said that “both levels of analysis confirmed the existence of an emigration lifecycle: Emigration rises along with rising incomes at first, only falling at much higher incomes. Rising incomes for relatively poor countries or people do not immediately deter migration.”

The researchers found that: 

  • As GDP per capita rises, so do emigration rates. This relationship slows after roughly US$5,000, and reverses after roughly $10,000 (i.e. low- to middle-income, or the level of China or Mexico). 
  • Successful, sustained economic growth in the low-income countries is therefore likely to raise the emigration rate, at least in the short-term. As incomes rise, so too does people’s ability to afford the investments that make migration easier.  
  • These new migrants will not be among their countries poorest: in low-income countries, people actively preparing to emigrate have 30 percent higher incomes than the population on average, and 14 percent of these higher incomes come from more years of education. 

“This pattern is not new, or something to fear,” Michael Clemens, director of Migration, Displacement, and Humanitarian Policy and senior fellow at CGD, says. “As a poor country gets richer, at first more people emigrate, until the process eventually slows and reverses itself. We’ve seen it with Sweden a century ago and Mexico a half century ago. We’re seeing it now in Central America, and we’ll hopefully see the pattern emerge in sub-Saharan Africa as that region gets richer.” 

“The world’s poorest are not the ones who migrate,” said co-author Mariapia Mendola, professor of economics the Università degli Studi di Milano Bicocca and Director of the Poverty and Development Program at Centro Studi Luca d’Agliano in Milan. “Migration is seen as an investment, just like higher education. You wouldn’t decide not to send your kids to college just because your family is getting wealthier. Similarly, families are not deciding to stay put as their incomes rise. Migration changes lives and economies for the better.” 

“Policymakers may see this as a reason to cut foreign aid,” Clemens continued. “That would be unwise. Economic development overseas is in everyone’s long-term interest. It helps other countries prevent humanitarian disasters, fight pandemic disease, remain stable, and engage with the world economy. Perversely encouraging poverty, out of a misplaced fear of migration, is a road to nowhere.” 

The individual-level paper is available here, and the country-level paper here, both with accompanying data. You can read Michael’s overview blog here.


Simon Ateba
Simon Ateba
Based in Washington, District of Columbia, United States of America, Simon leads a brilliant team of reporters, freelance journalists, analysts, researchers and contributors from around the world to run TODAY NEWS AFRICA as editor-in-chief. Simon Ateba's journalistic experience spans over 10 years and covers many beats, including business and investment, information technology, politics, diplomacy, human rights, science reporting and much more. Write him:


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