Nathan Nunn is an Assistant Professor of Economics at Harvard University. Professor Nunn was born in Canada, where he received his PhD from the University of Toronto in 2005. Professor Nunn’s primary research interests are in international trade, economic development, and economic history. He is an Associate editor of the Journal of International Economics and an NBER Faculty Research Fellow.

One stream of Nunn’s research focuses on the relationship between historic events and current economic performance within Africa. In “Historical Legacies: A Model Linking Africa’s Past to its Current Underdevelopment”, published in the Journal of Development Economics in 2007, Nunn develops a game-theoretic model showing how the slave trade and colonial rule could have had permanent long-term effects on economic performance. In “The Long-Term Effects of Africa’s Slave Trades” (Quarterly Journal of Economics, 2008), Nunn documents the long-term adverse economic effects of Africa’s slave trades.

A second stream of Professor Nunn’s research focuses on the importance of hold-up and incomplete contracting in international trade. He has published research showing that a country’s ability to enforce written contracts is a key determinant of comparative advantage (“Relationship-Specificity, Incomplete Contracts and the Pattern of Trade”, Quarterly Journal of Economics, 2007).

Summary of talk:

In his presentation "The Slave Trade and the Origins of Mistrust in Africa", Nathan Nunn offers an empirical investigation into the relationship between Africa's Slave Trade (1400 to 1900) and its culture of mistrust today. The project is an individual-level analysis of whether members of heavily enslaved ethnic groups in Africa display lower levels of trust today. The underlying argument posits that the slave trade created a culture of "enslave or be enslaved", where a non-trivial proportion of slaves were actually tricked and sold off into slavery by their own friends or family members. These conditions left a legacy of mistrust that has persisted to this day.

The empirical analysis relies on estimates of slave flows and records of slaves' ethnic membership. It also relies on 2003 Afrobarometer survey data to measure individual attitudes of trust toward neighbors, family members, local councilmen and co-ethnics in 17 sub-Saharan African countries. The results indicate a negative effect of Africa's slave trade on individual levels of trust: ethnic groups most affected by the slave trade are most likely to be distrusting today. The results further show that this occurs not through the effect the slave trade had on the locality in which the individual currently resides, but rather through the effect the slave trade had on that individual's ethnic ancestors.

» Paper: "The Slave Trade and the Origins of Mistrust in Africa" (pdf)

Why do community-based education and social persuasion programs for promoting healthy lifestyle and preventing chronic disease sometimes fall short of our expectations? Why are population effects so difficult to engineer and why are they so ephemeral?

This research carried out at USC, the Claremont Graduate University, and collaborating institutions in China integrates across social, behavioral, and neurocognitive sciences to address those questions. We conclude tentatively that the answer to each of the questions may lie in individual and context variability relative to program response, and that in order to more fully address the question of prevention program response variability requires engagement and integration across several levels of science to consider the roles of social groupings, environmental selection and design, social influence processes, and brain biology.

What works in one social, cultural or organizational setting may not be so effective in another. What works for persons with certain genetic and experiential backgrounds may be totally ineffective for persons with different dispositional or personality characteristics. In a series of community/school based prevention trials carried out in markedly different southern California and central China settings, we have uncovered domains of consistent response, and other domains of substantial environment- and disposition-based response variability.

A social influences based smoking prevention program framed in collectivist values and objectives worked to prevent smoking in one cultural setting but not another. And an individualist framed social influences program worked in the setting where the collectivist program did not. But the characteristics of the particular settings, which defined program success or failure, were different from what conventional (e.g., cultural psychology) wisdom would have led us to expect. Furthermore, both within and across cultural settings, the same individual dispositional characteristics moderated or determined program effectiveness, again in ways not predicted by the common cultural and behavioral science wisdom.

In recent studies carried out both in China and the U.S. we have found affective decision deficits, with known neural underpinnings, to account for rapid progression to regular smoking and binge drinking. These deficits are akin to the dispositional characteristics found earlier to moderate prevention program effects. Subsequent brain imaging studies confirm the hypothesized regions of neural involvement. Together these findings hold promise for more effective – situation and phenotype specific – approaches to engendering and sustaining more optimal individual and population health behavior.

Before coming to CDDRL, Miriam Abu Sharkh was employed at the United Nation's specialized agency for work, the International Labour Organization, in Geneva, Switzerland. As the People's Security Coordinator (P4), she analyzed and managed large household surveys from Argentina to Sri Lanka. She also worked on the Report on the World Social Situation for the United Nation's Department of Economic and Social Affairs in New York. Previously, she had also been a consultant for the German national development agency (Gesellschaft für Technische Zusammenarbeit, GTZ) in Germany where she focused on integrating core labor standards into German technical cooperation.

She has written on the spread and effect of human rights related labour standards as well as on welfare regimes, gender discrimination, child labour, social movements and work satisfaction.

Currently, she holds a grant by the German National Science Foundation (Deutsche Forschungsgemeinschaft) to study the evolvement of worldwide patterns of gender discrimination in the labor market, specifically the effects of international treaties. These questions are addressed in longitudinal, cross-national studies from the 1950´s to today.

This research builds on her previous work as a Post-doctoral Fellow at CDDRL as well as her dissertation on child labor for which she received a "Summa cum Laude" ( Freie Universität Berlin, Germany-joint dissertation committee with Stanford University). After discussing various labor standard initiatives, the dissertation analyzes when and why countries ratify the International Labour Organization's Minimum Age Convention outlawing child labour via event history models. It then examines the effect of ratification on child labor rates over three decades through a panel analyses. While her dissertation employed quantitative methods, her Diplom thesis (Freie Universität Berlin, Germany) builds on extensive fieldwork in South Africa examining the genesis, strategies, and structures of the South African women's movement.

She has traveled extensity, both professionally and privately, loves to dive and sail and speaks German, Spanish and French as well as rudimentary Arabic.

Her current research interests include labor related international human rights, especially child labour and (non-)discrimination, social movements and work satisfaction.

A new moral, ethical, and legal framework is needed for international human rights law. Never in human history has there been such an elaborate international system for human rights, yet from massive disasters, such as the Darfur genocide, to everyday tragedies, such as female genital mutilation, human rights abuses continue at an alarming rate. As the world population increases and global trade brings new wealth as well as new problems, international law can and should respond better to those who live in fear of violence, neglect, or harm.

Modern critiques global human rights fall into three categories: sovereignty, culture, and civil society. These are not new problems, but have long been debated as part of the legal philosophical tradition. Taking lessons from tradition and recasting them in contemporary light, Helen Stacy proposes new approaches to fill the gaps in current approaches: relational sovereignty, reciprocal adjudication, and regional human rights. She forcefully argues that law and courts must play a vital role in forging a better human rights vision in the future.