Implications of migration

Return migration can have multiple benefits. It allows migrants who have accumulated savings abroad to ease credit constraints at home and set up a business. Also, emigrants from developing countries who have invested in their human capital may earn higher wages when they return. However, whether the home country benefits from return migrants depends on the migrant’s success in accumulating savings and human capital and on the home country’s ability to make use of returnees’ skills and investment. To benefit from returnees, home countries need policies that encourage returnees’ investment and labor market reintegration.

Estimating the causal effect of immigration on the labor market outcomes of native workers has been a major concern in the literature. Because immigrants decide whether and where to migrate, immigrant populations generally consist of individuals with characteristics that differ from those of a randomly selected sample. One solution is to focus on events such as civil wars and natural catastrophes that generate rapid and unexpected flows of refugees into a country unrelated to their personal characteristics, location, and employment preferences. These “natural experiments” yield estimates that find small negative effects on native workers’ employment but not on wages.

Decreased transportation costs have led to the transmission of ideas and values across national borders that has helped reduce the barriers to international labor mobility. In this context, high-skilled individuals are more likely to vote with their feet in response to high income taxes. It is thus important to examine the magnitude of tax-driven migration responses in developed countries as well as the possible consequences of income tax competition between nation states. More specifically, how does the potential threat of migration affect a country’s optimal income tax policies?

With the aging of populations, particularly in more developed countries, retirees are becoming a politically influential group. Government budgets have been feeling the strain on social insurance, health care, and other programs that benefit the elderly. Yet spending on these programs has often come at the expense of other programs such as education, which benefit primarily the younger population. Attracting retirees has been viewed as an important avenue of economic development, with positive impacts on revenue and expenditure. However, it can also have a negative impact on education spending potentially resulting in intergenerational fiscal conflict.

Taxpayer effects are a central part of the total economic costs and benefits of immigration, but they have not received much study. These effects are the additional or lower taxes paid by native-born households due to the difference between tax revenues paid and benefits received by immigrant households. The effects vary considerably by immigrant attributes and level of government involvement, with costs usually diminishing greatly over the long term as immigrants integrate fully into society.

Immigrants are typically not evenly distributed within host countries; instead they tend to cluster in particular neighborhoods. But does clustering in ethnic enclaves help explain the persistent differences in employment rates and earnings between immigrants and the native population? Empirical studies consistently find that residing in an enclave can increase earnings. While it is still ambiguous whether mainly low-skilled immigrants benefit, or whether employment probabilities are affected, it is clear that effects are driven by enclave “quality” (in terms of income, education, and employment rates) rather than enclave size.

Knowing whether corruption leads to higher emigration rates—and among which groups—is important because most labor emigration is from developing to developed countries. If corruption leads highly-skilled and highly-educated workers to leave developing countries, it can result in a shortage of skilled labor and slower economic growth. In turn, this leads to higher unemployment, lowering the returns to human capital and encouraging further emigration. Corruption also shifts public spending from health and education to sectors with less transparency in spending, disadvantaging lower-skilled workers and encouraging them to emigrate.

The ongoing relationships between emigrants and their families, friends, and business contacts in their home countries can increase outbound and inbound cross-border travel, while cross-border tourism and business and study trips can trigger migration. New communication technologies, such as social media and video chat, only partially substitute for face-to-face meetings. In fact, the greater use of such technologies boosts demand for in-person meetings. Short- and long-term cross-border movements are becoming more complex, creating challenges for measuring immigration and for defining target populations for legislation and public policy.