Person:
Özler, Berk
Author Name Variants
Fields of Specialization
Poverty and inequality,
Social Protection,
Gender,
Maternal and Child Health
Degrees
External Links
Departments
Development Research Group
Externally Hosted Work
Contact Information
Last updated
August 22, 2023
Biography
Berk Özler is a lead economist in the Development Research Group, Poverty Cluster. He received his B.Sc. in Mathematics from Bosphorous University in 1991, and his Ph.D in Economics from Cornell University in 2001. After working on poverty and inequality measurement, poverty mapping, and the 2006 World Development Report on Equity and Development earlier, he decided to combine his interests in cash transfer programs and HIV risks facing young women in Africa by designing a field experiment in Malawi. He has since been involved in a number of cluster-randomized field experiments. He is a co-founder of and a regular contributor to the Development Impact blog.
Publication Search Results
1 - 10 of 18
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Publication
The Regressive Demands of Demand-Driven Development
(Elsevier, 2013-07-26)Despite their explicit focus on reaching the poor, many community driven development (CDD) initiatives are only partially successful in targeting spending towards them. This paper examines Tanzania's flagship CDD program and provides new evidence on the mechanisms by which the demand-driven components of the program may undermine the goal of pro-poor funding allocations. We exploit two data sources for the analysis: a census of wards for mainland Tanzania and a census of households in 100 program villages. These data paint a consistent picture at both levels: wealth, education, access to media, and political engagement are positively correlated with the likelihood to apply for the program at the national level, and to be aware of it at the local level. Centrally dictated features of the program – namely predetermined funding allocations to districts and eligibility rules – combine with the decentralized selection process within districts to counteract this initially regressive application pattern and produce a program that is, like many other CDD programs, only mildly pro-poor. Our results suggest that sensitization and outreach prior to the application process will be a critical dimension in making CDD programs more progressive. -
Publication
Designing Experiments to Measure Spillover Effects
(World Bank, Washington, DC, 2014-03)This paper formalizes the design of experiments intended specifically to study spillover effects. By first randomizing the intensity of treatment within clusters and then randomly assigning individual treatment conditional on this cluster-level intensity, a novel set of treatment effects can be identified. The paper develops a formal framework for consistent estimation of these effects, provides explicit expressions for power calculations, and shows that the power to detect average treatment effects declines precisely with the quantity that identifies the novel treatment effects. A demonstration of the technique is provided using a cash transfer program in Malawi. -
Publication
The Heterogeneous Effects of HIV Testing
(World Bank, Washington, DC, 2014-03)An extensive multi-disciplinary literature examines the effects of learning one's HIV status on subsequent risky sexual behaviors. However, many of these studies rely on non-experimental designs; use self-reported outcome measures, or both. This study investigates the effects of a randomly assigned home based HIV testing and counseling (HTC) intervention on risky sexual behaviors and schooling investments among school-age females in Malawi. The study finds no overall effects on HIV, Herpes Simplex Virus (HSV-2), or achievement test scores at follow-up. However, among the small group of individuals who tested positive for HIV, a large increase in the probability of contracting HSV-2 is found, with this effect stronger among those surprised by their test results. Similarly, those surprised by HIV-negative test results see a significant improvement in achievement test scores, consistent with increased returns to investments in human capital. The finding of increased HSV-2 prevalence among HIV-positive individuals suggests that the conventional wisdom that those who learn they are HIV-positive will adopt safer sexual practices should be treated with caution. -
Publication
Conditional, Unconditional and Everything in Between : A Systematic Review of the Effects of Cash Transfer Programs on Schooling Outcomes
(Taylor and Francis, 2014-03-06)Cash transfer programmes are a popular social protection tool in developing countries that aim, among other things, to improve education outcomes in developing countries. The debate over whether these programmes should include conditions has been at the forefront of recent policy discussions. This systematic review aims to complement the existing evidence on the effectiveness of these programmes in improving schooling outcomes and help inform the debate surrounding the design of cash transfer programmes. Using data from 75 reports that cover 35 different studies, the authors find that both conditional cash transfers (CCTs) and unconditional cash transfers (UCTs) improve the odds of being enrolled in and attending school compared to no cash transfer programme. The effect sizes for enrolment and attendance are always larger for CCTs compared to UCTs, but the difference is not statistically significant. When programmes are categorised as having no schooling conditions, having some conditions with minimal monitoring and enforcement and having explicit conditions that are monitored and enforced, a much clearer pattern emerges whereby programmes that are explicitly conditional, monitor compliance and penalise non-compliance have substantively larger effects (60% improvement in odds of enrolment). Unlike enrolment and attendance, the effectiveness of cash transfer programmes on improving test scores is small at best. More research is needed that examines longer-term outcomes such as test scores and, more generally, evaluating the impacts of UCTs. -
Publication
Inequality of Opportunity and Economic Growth : A Cross-Country Analysis
(World Bank, Washington, DC, 2014-06)Income differences arise from many sources. While some kinds of inequality, caused by effort differences, might be associated with faster economic growth, other kinds, arising from unequal opportunities for investment, might be detrimental to economic progress. This study uses two new metadata sets, consisting of 118 household surveys and 134 Demographic and Health Surveys, to revisit the question of whether inequality is associated with economic growth and, in particular, to examine whether inequality of opportunity -- driven by circumstances at birth -- has a negative effect on subsequent growth. The results are suggestive but not robust: while overall income inequality is generally negatively associated with growth in the household survey sample, we find no evidence that this is due to the component associated with unequal opportunities. In the Demographic and Health Surveys sample, both overall wealth inequality and inequality of opportunity have a negative effect on growth in some of the preferred specifications, but the results are not robust to relatively minor changes. On balance, although the results are suggestive of a negative association between inequality and growth, the data do not permit robust conclusions as to whether inequality of opportunity is bad for growth. -
Publication
The Heterogeneous Effects of HIV Testing
(Elsevier, 2014-09)An extensive multi-disciplinary literature examines the effects of learning one's HIV status on subsequent risky sexual behaviors. However, many of these studies rely on non-experimental designs; use self-reported outcome measures; or both. In this study, we investigate the effects of a randomly assigned home based HIV testing and counseling (HTC) intervention on risky sexual behaviors and schooling investments among school-age females in Malawi. We find no overall effects on HIV, Herpes Simplex Virus (HSV-2), or achievement test scores at follow-up. However, among the small group of individuals who tested positive for HIV, we find a large increase in the probability of HSV-2 infection, with this effect being stronger among those surprised by their test results. Similarly, those surprised by HIV-negative test results have significantly higher achievement test scores at follow-up, consistent with increased returns to investments in human capital. -
Publication
Keeping Girls in School: A Review of the Global Evidence
(World Bank, Washington, DC, 2015-11-25)Gender gaps in education have closed in almost all countries, especially at the primary level. In fact, these gaps have reversed in many countries in secondary education, especially in Latin America, the Caribbean, and East Asia, where it is now boys and young men who are disadvantaged. Despite the overall progress, however, primary and secondary school enrollments for girls remain much lower than for boys for disadvantaged populations in many Sub-Saharan countries and some parts of South Asia (World Bank 2012). One of the key messages of the World Development Report on Gender Equality and Development is that much of the progress was possible when the removal of a single barrier was sufficient to make significant gains. Three main areas where this has been possible are: (i) increasing returns to education for women; (ii) removing institutional constraints; and (iii) increasing household incomes. In this policy brief, we summarize the extant evidence in these three areas and draw some policy conclusions. -
Publication
The Regressive Demands of Demand-Driven Development
( 2011-11-01)Despite their explicit focus on reaching the poor, many community driven development (CDD) projects have been found to be only mildly pro-poor in their funding allocations. This paper presents evidence of an explanation that has been overlooked in the CDD literature to date: the requirement that beneficiaries must apply for projects in order to receive support. The authors first examine data on the universe of project applications and funding under Tanzania's flagship CDD program, Tanzania's Social Action Fund, and then use a census of 100 program villages to examine the determinants of both program awareness and program participation at the household level. The data paint a consistent picture at both levels: wealth, access to information, and political capital are important correlates of the ability to navigate the application process successfully. The centrally dictated features of this decentralized program appear to be the most effective mechanisms in directing funds to the poor. The results suggest that unless demand-driven projects can develop ways of soliciting engagement from a broader cross-section of the population, they are unlikely to achieve truly progressive targeting. -
Publication
The Impact of Economics Blogs
( 2011-08-01)There is a proliferation of economics blogs, with increasing numbers of economists attracting large numbers of readers, yet little is known about the impact of this new medium. Using a variety of experimental and non-experimental techniques, this study quantifies some of their effects. First, links from blogs cause a striking increase in the number of abstract views and downloads of economics papers. Second, blogging raises the profile of the blogger (and his or her institution) and boosts their reputation above economists with similar publication records. Finally, a blog can transform attitudes about some of the topics it covers. -
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The Short-Term Impacts of a Schooling Conditional Cash Transfer Program on the Sexual Behavior of Young Women
( 2010)Recent evidence suggests that conditional cash transfer (CCT) programs for schooling are effective in raising school enrolment and attendance. However, there is also reason to believe that such programs can affect other outcomes, such as the sexual behavior of their young beneficiaries. Zomba Cash Transfer Program is a randomized ongoing CCT intervention targeting young women in Malawi that provides incentives (in the form of school fees and cash transfers) to current schoolgirls and recent dropouts to stay in or return to school. An average offer of US$ 10/month conditional on satisfactory school attendance--plus direct payment of secondary school fees--led to significant declines in early marriage, teenage pregnancy, and self-reported sexual activity among program beneficiaries after just one year of program implementation. For program beneficiaries who were out of school at baseline, the probability of getting married and becoming pregnant declined by more than 40 and 30%, respectively. In addition, the incidence of the onset of sexual activity was 38% lower among all program beneficiaries than the control group. Overall, these results suggest that CCT programs not only serve as useful tools for improving school attendance but may also reduce sexual activity, teen pregnancy, and early marriage.