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Publications (11)
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...
Working Paper
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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...
Working Paper
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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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– Food Marketing Policies in Eastern Africa
Food marketing is one of the fields where structural adjustment has been implemented throughout the Sub-Saharan Africa. This study analyses the impact of reform on the functioning and efficiency of food marketing. It is based on a comparative analysis of three maize-producing countries, namely...
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This paper analyses the rationale of interventions in foreign exchange markets in Sub- Saharan Africa and reviews exchange rate theory and balance of payments management and its application to African countries. It analyses the liberalization of foreign exchange markets and the impact of these...
Working Paper
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– An Assessment of the Liberalization of Food Marketing in Sub-Saharan Africa
The liberalization of food marketing has been implemented as part of structural adjustment programmes in Sub-Saharan Africa. In this study we assess i) the aims of reform policy, ii) the implementation of specific reform measures, iii) the politics of reform, and iv) the impacts of reform. The study...
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