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Publications (27)
Working Paper
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Tracking poverty is predicated on the availability of comparable consumption data and reliable price deflators. However, regular series of strictly comparable data are only rarely available. Poverty prediction methods that track consumption correlates as opposed to consumption itself have been...
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The Impact of Multiple Imputation of Coarsened Data on Estimates on the Working Poor in South Africa
South African household surveys typically contain coarsened earnings data, which consist of a mixture of missing earnings values, point responses and interval-censored responses. This paper uses sequential regression multivariate imputation to impute missing and interval-censored values in the 2000...
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Macroeconomic instability has been increasingly considered as a factor lowering average income growth and, in this way, is a factor slowing down poverty reduction. But it can also result in slower poverty reduction for a given average rate of growth, due to poverty traps, often examined at the...
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– Income over Time, Aspirations and Reference Groups
How a person assesses the wellbeing derived from income is often determined as much by its contrast with a reference point as by the level of income itself. In this paper, I use a household survey from Mexico to examine how subjective poverty assessments not only depend on the absolute level of...
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We examine the measurement of individual poverty in an intertemporal context. Our aim is to capture the importance of persistence in a state of poverty and we characterize a corresponding individual intertemporal poverty measure. Our first axiom requires that intertemporal poverty is identical to...
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This paper demonstrates the implications of adopting an approach to measuring poverty that takes into account the lifetime experience of individuals rather than simply taking a static or cross-sectional perspective. Our approach follows the theoretical innovations in Hoy and Zheng (2008) which...
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The analysis of poverty dynamics yields important insights about the expected effectiveness of alternative social policies on poverty reduction. This paper analyses the effect of spell recurrence on poverty dynamics taking into account multiple poverty and non-poverty spells. Using longitudinal data...
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Households in developing countries use a variety of informal mechanisms to cope with risk, including mutual support and risk-sharing. These mechanisms cannot avoid that they remain vulnerable to shocks. Public programs in the form of food aid distribution and food-for-work programs are meant to...
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In this paper we review the evidence on the impact of large shocks, such as drought, on child and adult health, with particular emphasis on Zimbabwe and Ethiopia. Our focus is on the impact of shocks on long-term outcomes, and we ask whether there are intrahousehold differences in these effects. The...
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– The Director's Cut
Traditional poverty measures neglect several important dimensions of household welfare. In this paper we construct a measure of ‘vulnerability’ which allows us to quantify the welfare loss associated with poverty as well as the loss associated with any of a variety of different sources of...
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We use public transfers in the form of food aid to test for the presence of risk sharing arrangements at the village level in rural Ethiopia. We reject perfect risk-sharing, but find evidence of partial risk-sharing via transfers. There is also evidence consistent with crowding out of informal...
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Many argue that poverty is intimately linked with ‘vulnerability’. Still, there is no consensus about how to define and measure ‘vulnerability’. We review theory and describe strengths and limits of recently proposed measures. We then propose a definition of vulnerability and develop a general...
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In economic literature insurance networks are often treated as exogenous institutions. Frequently, the assumption is made that some clearly identifiable group (e.g. ‘the whole village’ or ‘the extended family’) constitutes an insurance network. Still, theory suggests that the formation of insurance...
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– Learning from Visa®?
We examine a simple extension to existing credit contacts for the poor (‘microfinance contracts’), that would allow financial institutions to provide repayment insurance to their clients. The proposed contract uses the repeated nature of loans to build credit records that borrowers in good standing...
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– Testing Theories of Risk-Sharing in the ICRISAT Study Region of South India
Panel data from villages in rural south India have been used for leading econometric studies on risk-sharing in village economies. The work has influenced debate on safety net design world-wide and has driven scholarly agendas on household economics. This paper critically surveys work to date and...
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The paper considers the macroeconomic impact of shocks to agricultural output and of negative and positive price shocks. It is shown that negative price shocks have particularly large externalities: it is estimated that the overall impact of these negative shocks on GDP may well be double their...
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