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1. The New Economic Case for Migration Restrictions

Author:
Michael Clemens and Lant Pritchett
Publication Date:
02-2016
Content Type:
Working Paper
Institution:
The John F. Kennedy School of Government at Harvard University
Abstract:
For decades, migration economics has stressed the effects of migration restrictions on income distribution in the host country. Recently the literature has taken a new direction by estimating the costs of migration restrictions to global economic efficiency. In contrast, a new strand of research posits that migration restrictions could be not only desirably redistributive, but in fact globally efficient. This is the new economic case for migration restrictions. The case rests on the possibility that without tight restrictions on migration, migrants from poor countries could transmit low productivity ("A" or Total Factor Productivity) to rich countries—offsetting efficiency gains from the spatial reallocation of labor from low to high-productivity places. We provide a novel assessment, proposing a simple model of dynamically efficient migration under productivity transmission and calibrating it with new macro and micro data. In this model, the case for efficiency-enhancing migration barriers rests on three parameters: transmission, the degree to which origin-country total factor productivity is embodied in migrants; assimilation, the degree to which migrants’ productivity determinants become like natives’ over time in the host country; and congestion, the degree to which transmission and assimilation change at higher migrant stocks. On current evidence about the magnitudes of these parameters, dynamically efficient policy would not imply open borders but would imply relaxations on current restrictions. That is, the new efficiency case for some migration restrictions is empirically a case against the stringency of current restrictions.
Topic:
Economics, Migration, Labor Issues, and Economy
Political Geography:
Global Focus

2. Migration as a Strategy for Household Finance: A Research Agenda on Remittances, Payments, and Development

Author:
Michael Clemens and Timothy N. Ogden
Publication Date:
02-2014
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
It is time to fundamentally reframe the research agenda on remittances, payments, and development. We describe many of the research questions that now dominate the literature and why they lead us to uninformative answers. We propose reasons why these questions dominate, the most important of which is that researchers tend to view remittances as states do (as windfall income) rather than as families do (as returns on investment). Migration is, among other things, a strategy for financial management in poor households: location is an asset, migration an investment. This shift of perspective leads to much more fruitful research questions that have been relatively neglected. We suggest 12 such questions.
Topic:
Economics, Migration, Political Economy, Poverty, Labor Issues, and Immigration

3. Does Development Reduce Migration?

Author:
Michael Clemens
Publication Date:
03-2014
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
The most basic economic theory suggests that rising incomes in developing countries will deter emigration from those countries, an idea that captivates policymakers in international aid and trade diplomacy. A lengthy literature and recent data suggest something quite different: that over the course of a "mobility transition", emigration generally rises with economic development until countries reach upper-middle income, and only thereafter falls. This note quantifies the shape of the mobility transition in every decade since 1960. It then briefly surveys 45 years of research, which has yielded six classes of theory to explain the mobility transition and numerous tests of its existence and characteristics in both macro- and micro-level data. The note concludes by suggesting five questions that require further study.
Topic:
Economics, Migration, Social Stratification, Social Movement, and Developing World
Political Geography:
United States, Canada, and Mexico

4. A Case against Taxes and Quotas on High-Skill Emigration

Author:
Michael Clemens
Publication Date:
05-2014
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
Skilled workers have a rising tendency to emigrate from developing countries, raising fears that their departure harms the poor. To mitigate such harm, researchers have proposed a variety of policies designed to tax or restrict high-skill migration. Those policies have been justified as Pigovian regulations to raise efficiency by internalizing externalities, and as non-Pigovian regulations grounded in equity or ethics. This paper challenges both sets of justifications, arguing that Pigovian regulations on skilled emigration are inefficient and non-Pigovian regulations are inequitable and unethical. It concludes by discussing a different class of policy intervention that, in contrast, has the potential to raise welfare.
Topic:
Economics, Human Rights, Human Welfare, Immigration, and Monetary Policy
Political Geography:
India

5. The New Transparency in Development Economics: Lessons from the Millennium Villages Controversy

Author:
Michael Clemens and Gabriel Demombynes
Publication Date:
09-2013
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
The Millennium Villages Project is a high profile, multi-country development project that has aimed to serve as a model for ending rural poverty in sub-Saharan Africa. The project became the subject of controversy when the methodological basis of early claims of success was questioned. The lively ensuing debate offers lessons on three recent mini-revolutions that have swept the field of development economics: the rising standards of evidence for measuring impact, the “open data” movement, and the growing role of the blogosphere in research debates.
Topic:
Development, Economics, Poverty, and Foreign Aid
Political Geography:
Africa

6. Economics and Emigration: Trillion-dollar Bills on the Sidewalk?

Author:
Michael Clemens
Publication Date:
08-2011
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
Large numbers of people born in poor countries would like to leave those countries, but barriers prevent their emigration. Those barriers, according to economists' best estimates to date, cost the world economy much more than all remaining barriers to the international movement of goods and capital combined. Yet economists spend much more time studying the movement of goods and capital, and when they study migration at all, they focus on the effects of immigration on nonmigrants in destination countries. I ask why this is the case and sketch a four-point research agenda on the effects of emigration. Barriers to emigration deserve a research priority that is commensurate with their likely colossal economic effects.
Topic:
Economics, Migration, Poverty, and Immigration

7. When Does Rigorous Impact Evaluation Make a Difference? The Case of the Millennium Villages

Author:
Michael Clemens and Gabriel Demombynes
Publication Date:
10-2010
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
When is the rigorous impact evaluation of development projects a luxury, and when a necessity? We study one high-profile case: the Millennium Villages Project (MVP), an experimental and intensive package intervention to spark sustained local economic development in rural Africa. We illustrate the benefits of rigorous impact evaluation in this setting by showing that estimates of the project's effects depend heavily on the evaluation method. Comparing trends at the MVP intervention sites in Kenya, Ghana, and Nigeria to trends in the surrounding areas yields much more modest estimates of the project's effects than the before-versus-after comparisons published thus far by the MVP. Neither approach constitutes a rigorous impact evaluation of the MVP, which is impossible to perform due to weaknesses in the evaluation design of the project's initial phase. These weaknesses include the subjective choice of intervention sites, the subjective choice of comparison sites, the lack of baseline data on comparison sites, the small sample size, and the short time horizon. We describe how the next wave of the intervention could be designed to allow proper evaluation of the MVP's impact at little additional cost.
Topic:
Development, Economics, and Foreign Aid
Political Geography:
Africa and Nigeria

8. The Roots of Global Wage Gaps: Evidence from Randomized Processing of U.S. Visas

Author:
Michael Clemens
Publication Date:
06-2010
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
This study uses a unique natural experiment to test a simple model of international differences in workers' wages and productivity. Large differences in wages across countries could arise from several sources. These include barriers to trade in outputs, differences in technology, differences in workers, or differences in the other factors of production accessible in different countries. To measure the relative importance of these sources in one setting, this study exploits the randomized processing of U.S. visas for a group of Indian workers who produce software within a single multinational firm. In this setting, international barriers to trade in outputs, barriers to technology transfer, and all observable or unobservable differences between workers are extremely low. The results indicate that location outside of India causes a sixfold increase in the wages of the same worker using the same technology to produce a highly tradable good. Under plausible assumptions about competition in the industry, this suggests that country-of-work by itself is responsible—in this industry—for roughly three-quarters of the gap in productivity between workers in India and workers in the richest countries. These findings have implications for open questions in labor, growth, international, and development economics.
Topic:
Economics and Labor Issues
Political Geography:
United States and India

9. Blunt Instruments: On Establishing the Causes of Economic Growth

Author:
Michael Clemens and Samuel Bazzi
Publication Date:
05-2009
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
Despite intense concern that many instrumental variables used in growth regressions may be weak, invalid, or both, top journals continue to publish studies of economic growth based on problematic instruments. Doing so risks pushing the entire literature closer to irrelevance. We illustrate hidden problems with identification in recent prominently published and widely cited growth studies using their original data. We urge researchers to take three steps to overcome the shortcomings: grounding research in somewhat more generalized theoretical models, deploying the latest methods to test sensitivity to violations of the exclusion restriction, and opening the “black box” of the Generalized Method of Moments (GMM) with supportive evidence of instrument strength.
Topic:
Development, Economics, and Political Economy

10. Income Per Natural: Measuring Development for People rather than Places - Working Paper 143

Author:
Michael Clemens and Lant Pritchett
Publication Date:
03-2008
Content Type:
Working Paper
Institution:
Center for Global Development
Abstract:
It is easy to learn the average income of a resident of El Salvador or Albania. But there is no systematic source of information on the average income of a Salvadoran or Albanian. We create a first estimate a new statistic: income per natural—the mean annual income of persons born in a given country, regardless of where that person now resides. If income per capita has any interpretation as a welfare measure, exclusive focus on the nationally resident population can lead to substantial errors of the income of the natural population for countries where emigration is an important path to greater welfare. The estimates differ substantially from traditional measures of GDP or GNI per resident, and not just for a handful of tiny countries. Almost 43 million people live in a group of countries whose income per natural collectively is 50% higher than GDP per resident. For 1.1 billion people the difference exceeds 10%. We also show that poverty estimates are very different for national residents and naturals; for example, 26 percent of Haitian naturals who are not poor by the two-dollar-a-day standard live in the United States. These estimates are simply descriptive statistics and do not depend on any assumptions about how much of observed income differences across naturals is selection and how much is a pure location effect. Our conservative, if rough, estimate is that three quarters of this difference represents the effect of international migration on income per natural. This means that departing one's country of birth is today one of the most important sources of poverty reduction for a large portion of the developing world. If economic development is defined as rising human well being, then a residence-neutral measure of well-being emphasizes that crossing international borders is not an alternative to economic development, it is economic development.
Topic:
Demographics, Development, Economics, Migration, Poverty, and Population
Political Geography:
United States and Albania