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Publications (19)
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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– What Are the Issues at Stake?
The privatization trend affecting the state involvement in productive sectors is also challenging the role of the state in the provision of social services. And, as private participation in social sectors increases, a regulatory framework is needed to ensure that the market reaches socially...
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– A Critical Review
The aim of this paper is to review the principal assumptions and aspects of the unitary household model and collective models of household behaviour. Empirical studies are presented to assess whether the theories can offer adequate descriptions of household behaviour and to examine the types of...
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– A Long-Term Perspective
This paper discusses the main changes in infant, child and maternal mortality which have occurred over 1960-1995 in Sub-Saharan Africa and analyses the main factors responsible for the observed shifts in these health trends. To do so, the paper surveys the major mortality models discussed in the...
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– A Case Study of Tanzania
The first part of the paper describes steps which Tanzania took in order to provide key social services to her people. Tanzania made great efforts within the ujamaa socialist system to provide free social services for rural as well as urban people, regardless of their income level. Even after the...
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– Towards Synergy
In recent years churches, NGOs and community associations, commonly referred to as civic organizations, have been playing an increasing role in the provision of social services in response to fiscal stress, state inefficiency and an ideological environment favouring non-state action. In this paper...
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The analysis of the optimal funding of education is complicated by the numerous and serious market failures which are likely to characterize a free market for education. Prominent amongst these are the likely external benefits of education, stressed by some new economic growth models. However, no...
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– Concepts and Issues
This paper is the fruit of an attempt to distinguish the elements, present in a fiscal decentralization process, that are likely to contribute to efficiency enhancement in the provision of social services in developing countries. From the methodological point of view, the paper makes an effort...
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A good deal is known about what makes for successful economic development, but very little is known about how to get there - that entails an understanding of the process of economic change. The paper first examines the sources of successful growth and then explores the process of dynamic change of...
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– A Review of the Underlying Theory and Assumptions
The paper reviews the theoretical basis for the application of user fees in the public health sector in low-income countries with particular reference to the special characteristics of medical care as a commodity. The general equilibrium efficiency result of the market mechanism is shown to be the...
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