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This paper discusses different approaches to the measurement of global interpersonal in equality. Trends in global interpersonal inequality during 1975-2005 are measured using data from UNU-WIDER’s World Income Inequality Database. In order to better understand the trends, global interpersonal inequality is decomposed into within-country and between-country inequality. The paper illustrates that the relationship between global interpersonal inequality and these constituent components is a complex one. In particular, we demonstrate that the changes in China's and India's income distributions over the past 30 years have simultaneously caused inequality to rise domestically in those countries, while tending to reduce global inter-personal inequality. In light of these findings, we reflect on the meaning and policy relevance of global vis-a- vis domestic inequality measures.

Notwithstanding the unprecedented attention devoted to reducing poverty and fostering human development via scaling up social sector spending, there is surprisingly little rigorous empirical work on the question of whether social spending is effective in

Social protection programmes have emerged as one of the most important anti-poverty policy strategies in developing countries. Their effects on poverty and well-being have been widely studied. Yet, there is limited knowledge on how a transfer programme sh

Preventable and treatable childhood diseases, notably acute respiratory infections and diarrhoeal diseases are the first and second leading causes of death and morbidity among young children in developing countries. The fact that a large proportion of child deaths are caused by these diseases is symptomatic of dysfunctional policy strategies and health systems in the developing world. Though clinical interventions against such diseases have been thoroughly studied, non-clinical interventions have received much less attention. This paper contributes to the existing literature on child wellbeing in two important respects: first, it presents a theory of change-based typology that emerges from a systematic review conducted on non-clinical interventions against preventable and treatable childhood diseases. Second, it pays particular attention to policies that have been tested in a developing country context, and which focus on children as the primary target population. Overall, we find that improved water supply and quality, sanitation and hygiene, as well as the provision of medical equipment that detect symptoms of childhood diseases, along with training and education for medical workers, are effective policy instruments to tackle diarrhoeal diseases and acute respiratory infections in developing countries.

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 development policy: governance. It aims to address two key questions: (1) ‘what have the main contributions of randomized controlled trials been to the study of governance?’ and (2) ‘what could be the contributions, and relatedly the limits of such methods?’ To address these questions, a systematic review of experimental and quasi-experimental methods to study government performance was conducted. It identified 139 relevant papers grouped into three major types of policy interventions that aim to: (1) improve supply-side capabilities of governments; (2) change individual behaviour through various devices, notably incentives, and (3) improve informational asymmetries. We find that randomized controlled trials can be useful in studying the effects of some policy interventions in the governance area, but they are limited in significant ways: they are ill-equipped to study broader governance issues associated with macro-structural shifts, national level variation in institutions and political culture, and leadership. Randomized controlled trials are best for studying targeted interventions, particularly in areas of public goods provision, voting behaviour, and specific measures to address corruption and improve accountability; however, they can provide little traction on whether the intervention is transferable and ‘could work’ (and why) in other contexts, and in the longer run.

This paper examines the impacts of the financial, food and fuel crises on the livelihoods of low-income households Nigeria. It uses primary household level data from Nigeria to analyse the impacts of induced price variability on household welfare. Our results indicate that aggregate shocks have significant adverse effects on household consumption, human capital, and labour decisions with a degree of impact variability between northern and southern regions of the country. We find that the coping strategies adopted by the poor to deal with the short-term effects of the crises, and which include substitution for lower quality food, increasing the intensity of work, withdrawing children from school – especially girls – and engaging children in child labour, can lock households in a low-income equilibrium or poverty trap. Provided that covariate shocks exacerbate these effects, tackling the effects of covariate risks becomes central for present and future development policy.

In this paper, I present an introduction to quantitative research methods in social sciences. The paper is intended for non-Economics undergraduate students, development researchers and practitioners who although unfamiliar with statistical techniques, are interested in quantitative methods to study social phenomena. The paper discusses conventional methods to assess the direction, strength and statistical significance of the correlation between two or more variables, and examines regression techniques and experimental and quasi-experimental research designs to establish causality in the analysis of public interventions.

This paper provides an overview of the recent extension of social protection in sub-Saharan Africa. It identifies two main " models" of social protection in the region: one based on age-based income transfers in the middle income countries in Southern Africa, and another more diverse and incipient group of programs providing a mix of poverty-based transfers in the low income countries in Eastern, Central, and West Africa. It concludes that for an effective institutional framework for social protection to evolve in sub-Saharan Africa, the present focus on the technical design of programs needs to be accompanied by analyses that contribute to also " getting the politics right." © 2011 Elsevier Ltd.

This paper provides an overview of the political and economic context under which Mexico’s Progresa-Oportunidades was introduced to prelude the emergence of social assistance in Latin America. The paper identifies four distinctive features of the programme that were revolutionary in their own right. First, the Progresa-Oportunidades embraced a multidimensional approach to poverty, linking income transfers with simultaneous interventions in health, education and nutrition. Second, the programme focused on the poor. This is in clear contrast to generalised food subsidies and other targeted interventions that dominated the antipoverty agenda in the past. Third, the programme followed a complex system of identification and selection of beneficiaries to prevent discretionary political manipulation of public funds. Finally, an independent impact evaluation protocol proved to be critical for both improving the programme’s effectiveness and strengthening its legitimacy across different political factions and constituencies. The paper concludes that the success of Progresa-Oportunidades must be understood in a broader context, where a harsh economic and political environment, coupled with a rapid democratisation and increasing political competition, laid down the foundations for the introduction and then sustained expansion of the programme

This paper provides an overview of the recent extension of social protection in sub- Saharan Africa. It identifies two main ‘models’ of social protection in the region: the Southern Africa and Middle Africa models. It then assesses the contrasting policy processes behind these models and examines the major challenges they face as regards financing, institutional capacity and political support. It concludes that, for an effective institutional framework for social protection to evolve in sub-Saharan African countries, the present focus on the technical design of social protection programmes needs to be accompanied by analyses that contribute to also ‘getting the politics right’.

The Social Assistance in Developing Countries Database is a user-friendly tool that provides summary information on social assistance interventions in developing countries. It provides a summary of the evidence available on the effectiveness of social assistance interventions in developing countries. It focuses on programmes seeking to combine the reduction and mitigation of poverty, with strengthening and facilitating household investments capable of preventing poverty and securing development in the longer term. The inclusion of programmes is on the basis of the availability of information on design features, evaluation, size, scope, or significance. Version 5 of the database updates information on existing programmes and incorporates information on pilot social assistance programmes in Latin America, Asia and Africa. It also adopts a new typology that distinguishes between social assistance programmes providing pure income transfers; programmes that provide transfers plus interventions aimed at human, financial, or physical asset accumulation; and integrated poverty reduction programmes. This new typology has, in our view, several advantages. It is a more flexible, and more accurate, template with which to identify key programme features. It provides a good entry point into the conceptual underpinnings of social assistance programmes.

Improved household accessibility to credit is identified as a significant determinant of intra-household re-allocation of labour resources with important implications for productivity, income, and poverty status. However, credit accessibility could also have wider impacts on poverty if it leads to new hires outside the household. This paper contributes to the existing literature on microcredit in two important ways: first, it investigates the routes through which microcredit reaches those in poverty outside the household. We test whether, by lending to the vulnerable non-poor, microcredit programmes can indirectly benefit poor labourers through increased employment. Second, we conduct the study in the spatial dimension of urban poverty Mexico. This is relevant when considering that, unlike in rural areas, labour often represents the only source of livelihoods to the extreme poor. Our findings point to significant trickle-down effects of microcredit that benefit poor labourers; however, these effects are only observed after loan-supported enterprising households achieve earnings well above the poverty line. The paper concludes with reflections on the policy implications.

In recent years, an important number of impact studies have attempted to examine the effect of credit on income poverty; however, many of these studies have not paid sufficient attention to the problems of endogeneity and selection bias. The few exceptional cases have employed econometric techniques that work at the village level. The problem is that the concept of village is inappropriate in the urban context where a large percentage of microfinance organisations in the developing world actually operate. This paper presents an econometric approach which controls for endogeneity and self-selection using data from a quasi-experiment designed at the household level, and conducted in three urban settlements in the surroundings of the Metropolitan area of Mexico City. The paper provides an estimation of the impact of credit, employing different equivalence scales in order to measure the sensitivity of the poverty impact to the intra-household distribution of welfare. We find a link between poverty impacts and lending technology. Group-based lending programmes are more effective in reducing the poverty gap but in doing so, they achieve insignificant impacts on the poverty incidence. By contrast, individual lending programmes reported significant and small impacts at the upper limits of deprivation but insignificant impacts on the poverty gap.

In recent years, an important number of impact studies have attempted to examine the effect of credit on income poverty; however, many of these studies have not paid sufficient attention to the problems of endogeneity and selection bias. The few exceptional cases have employed econometric techniques that work at the village level. The problem is that the concept of village is inappropriate in the urban context where a large percentage of microfinance organisations in the developing world actually operate. This paper presents an econometric approach which controls for endogeneity and self-selection using data from a quasi-experiment designed at the household level, and conducted in three urban settlements in the surroundings of the Metropolitan area of Mexico City. The paper provides an estimation of the impact of credit, employing different equivalence scales in order to measure the sensitivity of the poverty impact to the intra-household distribution of welfare. We find a link between poverty impacts and lending technology. Group-based lending programmes are more effective in reducing the poverty gap but in doing so, they achieve insignificant impacts on the poverty incidence. By contrast, individual lending programmes reported significant and small impacts at the upper limits of deprivation but insignificant impacts on the poverty gap.

This paper discusses the recent history of education aid policy, and introduces the studies that constitute this UNU-WIDER Special Issue. It highlights an important shift in policy-thinking in the international aid architecture that has dominated the global education aid agenda since the early 1990s. It argues that Rawlsian principles of social justice, human rights perspectives, and advancements in economic theory that emphasize the role of human capital in development have been central in that process. The studies of this Special Issue aim to address the general question of how aid can better support the collective actions that seek to improve education systems in developing countries. Overall, they provide an analysis of key policy strategies that can improve the functioning of education systems and the quality of services, and discuss major challenges for the future global education agenda.