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Publications (30)
Working Paper
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Social scientists are increasingly engaging in experimental research projects of importance for public policy in developing areas. While this research holds the possibility of producing major social benefits, it may also involve manipulating populations, often without consent, sometimes with...
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– Definitions and Diagrams
The fundamental problem of external validity is not to generalize from one experiment, so much as to experimentally test generalizable theories. That is, theories that explain the systematic variation of causal effects across contexts. Here we show how the graphical language of causal diagrams can...
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In recent years, randomized controlled trials have become increasingly popular in the social sciences. In development economics in particular, their use has attracted considerable debate in relation to the identification of ‘what works’ in development policy. This paper focuses on a core topic in...
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– Opportunities and Challenges
‘Ancillary experiments’ are a new technique whereby researchers use a completed experiment conducted by others to recover causal estimates of a randomized intervention on new outcomes. The method requires pairing new outcome data with randomized treatments the researchers themselves did not oversee...
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– Towards Experiments?
In examining the study of government performance, this paper asks whether field experiments can improve the explanatory precision of results generated by public opinion surveys. Survey research on basic health and education services sub-Saharan Africa shows that the perceived ‘user friendliness’ (or...
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– Experimental and Non-Experimental Methods in Development Economics
This paper provides a survey of six widely used non-experimental methods for estimating the impact of programmes in the context of developing economies (instrumental variables, regression discontinuity, direct matching, propensity score matching, linear regression and non-parametric methods, and...
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– Better Policies? Better Politics?
The paper provides a comparative analysis of the incidence of evaluation methods in antipoverty transfer programmes in Latin America and sub-Saharan Africa. The paper identifies two broad explanations for the incidence of evaluation in antipoverty transfer programmes in developing countries, one...
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– Xenophobia in Post-Apartheid South Africa
In May 2008, South Africa became the theatre of widespread violent attacks against undesirable ‘outsiders’. Over 60 were killed, hundreds wounded, and tens of thousands displaced. This analysis aims at identifying the characteristics of the victims in an attempt to portray the ‘alien’ using...
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This paper investigates whether cyclical variation in women’s labour supply in Africa contributes to smoothing household consumption. We find little support for this hypothesis. Using comparable individual data on about 0.5 million women in 30 Sub-Saharan African countries merged with country level...
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Empirical studies have shown that trade agreements have different effects on countries based on their level of development, especially in trade potentials. There have been several trade agreements between North-South and South-South countries, which are accompanied with different outcomes based on...
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This study revisits the effect of aid on the quality of institutions and examines the effects of a major source of instability, namely terms-of-trade instability, on the quality of democracy. We take advantage of previous empirical findings which explain the role of aid in mitigating the adverse...
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– A case study of Liberia’s telecommunication laws
The telecommunications sector in Africa presents many exciting prospects to international investors—indeed many billion dollar projects are already underway across the continent. Many of the continent’s current problems can be traced to the exploitation it has experienced whilst ‘doing business’...
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Purposeful, well-targeted and successful transformation policies will be elusive for a country or region that does not understand the relative importance of its sectoral sources of growth. This study aims at eliciting our understanding in this respect by providing an assessment of the relative...
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– Growth and Distributional Aspects
The United Nations Millennium Declaration commits to halving extreme poverty between 2000 and 2015. The South African government has set a goal of halving poverty by 2014, although the meaning of this goal has not yet been defined. This article specifies government’s stated target of halving poverty...
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– The Case of Africa
Scholars and policy makers believe that democracy will bring prosperity through integration into the global economy via increased international trade. This study tests two theories as to why democracies might trade more. First, political freedom may be correlated with economic freedom, thus...
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– A Comparative Analysis of Domestic and Foreign Banks
Utilizing the stochastic frontier approach, this study conducts a comparative analysis of profit efficiency and cost inefficiency of commercial banks operating in 29 sub-Saharan African (SSA) countries by bank ownership (domestic bank, SSA foreign bank or non-SSA foreign bank), as well as by the...
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