Data Deprivation: Another Deprivation to End

Serajuddin, Umar; Uematsu, Hiroki; Wieser, Christina; Yoshida, Nobuo; Dabalen, Andrew

doi:10.1596/1813-9450-7252

“…But, if the threshold that is used to identify the poor is expressed in the relative price levels as estimated by the 2005 PPP data, then the consumption and income distributions must also continue to be based on the 2005 PPPs. This option was considered and ultimately rejected -a decision that is in line with the majority of scholarly opinion that the 2011 PPPs incorporate a number of improvements 34 For an overview of countries missing poverty data, see Serajuddin et al (2015). 35 Reference years used in PovcalNet are 1981PovcalNet are , 1984PovcalNet are , 1987PovcalNet are , 1990PovcalNet are , 1993PovcalNet are , 1996PovcalNet are , 1999PovcalNet are , 2002PovcalNet are , 2005PovcalNet are , 2008PovcalNet are , 2010PovcalNet are , 2011PovcalNet are , 2012 in terms of coverage and methodology, and therefore provide a more accurate reflection of relative price levels in the world.…”

Section: Updating the International Poverty Line On The Basis Of The mentioning

confidence: 99%

A global count of the extreme poor in 2012: data issues, methodology and initial results

Ferreira

¹

,

Chen

²

,

Dabalen

³

et al. 2016

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The 2014 release of a new set of purchasing power parity (PPP) conversion factors (PPPs) for 2011 has prompted a revision of the World Bank's international poverty line. In revising the line, we have sought to minimize changes to the real purchasing power of the earlier $1.25 line (in 2005 PPPs), so as to preserve the integrity of the goalposts for international targets such as the Sustainable Development Goals (SDGs) and the World Bank's twin goals -which were set with respect to that line. In particular, the new line was obtained by inflating the same fifteen national poverty lines -originally used by Ravallion et al. In combination with other changes described in the paper, this revision leads to relatively small changes in global poverty incidence for 2011: from 14.5 % using the old method to 14.1 % using the new method. In 2012, the new reference year for the global count, we find 12.7 % of the world's population, or 897 million people, are living in extreme poverty. There are changes in the regional composition of poverty, but they are also relatively small. This paper documents methodological decisions taken in the process of updating both the poverty line and the consumption and income distributions at the country level, including issues of inter-temporal and spatial price adjustments. It also describes various caveats and limitations of the approach taken. Electronic supplementary material The online version of this article

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“…In particular, where household consumption data are available, it should not be taken for granted that these data are comparable over time. For example, Serajuddin et al (2015) find that over the period 2002-2011, almost one-fifth (i.e., 28) of the 155 countries for which the World Bank monitors poverty data using the WDI database have only one poverty data point. 3 As another example, a recent survey by Beegle et al (2016) points out that just more than half (i.e., 27) of the 48 countries in Sub-Saharan Africa had two or more comparable household surveys for the period between 1990 and 2012.…”

Section: Introductionmentioning

confidence: 99%

“…For example, households can grow larger with new members (through birth or marriage) or smaller (with previous members dying or migrating) over time, or the whole household can migrate, making it more difficult for interviewers to follow them. 3 In addition, Serajuddin et al (2015) also find that as many as 29 countries do not have any poverty data point in the same period. 4 Household consumption data may not exactly be comparable across different countries without a common conversion system for prices of goods and services.…”

Section: Introductionmentioning

confidence: 99%

Data Gaps, Data Incomparability, and Data Imputation: A Review of Poverty Measurement Methods for Data-Scarce Environments

Dang¹,

Jolliffe²,

Carletto³

2017

Policy Research Working Papers

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Standard-Nutzungsbedingungen:Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Zwecken und zum Privatgebrauch gespeichert und kopiert werden.Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich machen, vertreiben oder anderweitig nutzen.Sofern die Verfasser die Dokumente unter Open-Content-Lizenzen (insbesondere CC-Lizenzen) zur Verfügung gestellt haben sollten, gelten abweichend von diesen Nutzungsbedingungen die in der dort genannten Lizenz gewährten Nutzungsrechte. Terms of use: Documents in EconStor may AbstractWe offer a review of methods that have been employed to provide poverty estimates of poverty in contexts where household consumption data are unavailable or missing. These contexts range from completely missing and partially missing consumption data in cross sectional household surveys, to missing panel household data. We focus on methods that aim to compare trends and dynamic patterns of poverty outcomes over time. We present the various existing methods under a common framework, with pedagogical discussion on the intuition. Empirical illustrations are provided using several rounds of household survey data from Vietnam. Furthermore, we also offer a practical guide with detailed instructions on computer programs that can be used to implement the reviewed techniques.

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“…Note that, for China and India, survey data is available in the majority of the reference years, including in 2012, and no such extrapolation takes place for these two countries. 49 For an overview of countries missing poverty data see Serajuddin, et al (2015).…”

mentioning

confidence: 99%

A Global Count of the Extreme Poor in 2012: Data Issues, Methodology and Initial Results

Ferreira¹,

Chen²,

Dabalen³

et al. 2015

Policy Research Working Papers

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Standard-Nutzungsbedingungen:Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Zwecken und zum Privatgebrauch gespeichert und kopiert werden.Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich machen, vertreiben oder anderweitig nutzen.Sofern die Verfasser die Dokumente unter Open-Content-Lizenzen (insbesondere CC-Lizenzen) zur Verfügung gestellt haben sollten, gelten abweichend von diesen Nutzungsbedingungen die in der dort genannten Lizenz gewährten Nutzungsrechte. The Institute for the Study of Labor (IZA) in Bonn is a local and virtual international research center and a place of communication between science, politics and business. IZA is an independent nonprofit organization supported by Deutsche Post Foundation. The center is associated with the University of Bonn and offers a stimulating research environment through its international network, workshops and conferences, data service, project support, research visits and doctoral program. IZA engages in (i) original and internationally competitive research in all fields of labor economics, (ii) development of policy concepts, and (iii) dissemination of research results and concepts to the interested public. Terms of use: Documents inIZA Discussion Papers often represent preliminary work and are circulated to encourage discussion. Citation of such a paper should account for its provisional character. A revised version may be available directly from the author. The higher value of the line in US dollars reflects the fact that the new PPPs yield a relatively lower purchasing power of that currency vis-à-vis those of most poor countries. Because the line was designed to preserve real purchasing power in poor countries, the revisions lead to relatively small changes in global poverty incidence: from 14.5 percent in the old method to 14.1 percent in the new method for 2011. In 2012, the new reference year for the global count, we find 12.7 percent of the world's population, or 897 million people, are living in extreme poverty. There are changes in the regional composition of poverty, but they are also relatively small. This paper documents the detailed methodological decisions taken in the process of updating both the poverty line and the consumption and income distributions at the country level, including issues of inter-temporal and spatial price adjustments. It also describes various caveats, limitations, perils and pitfalls of the approach taken.

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Data Deprivation: Another Deprivation to End

Cited by 105 publications

References 4 publications

A global count of the extreme poor in 2012: data issues, methodology and initial results

A global count of the extreme poor in 2012: data issues, methodology and initial results

Data Gaps, Data Incomparability, and Data Imputation: A Review of Poverty Measurement Methods for Data-Scarce Environments

A Global Count of the Extreme Poor in 2012: Data Issues, Methodology and Initial Results

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