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Author: Ramses H. Abul Naga

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DARP Paper

Median Independent Inequality Orderings

Ramses H. Abul Naga and Tarik Yalcin

To date, inequality orderings for ordered response data are only suitable for comparing distributions that share a common median state. In this paper we propose a methodology for comparing distributions irrespective of t...Read more...

October 2010

DARP Paper

Catastrophic Health Expenditure and Household Well-Being

Ramses H. Abul Naga and Karine Lamiraud

According to the catastrophic health expenditure methodology a household is in catastrophe if its health out-of-pocket budget share exceeds a critical threshold. We develop a conceptual framework for addressing three que...Read more...

November 2008

DARP Paper

Statistical Inference for Multidimensional Inequality Indices

Ramses H. Abul Naga

We use the delta method to derive the large sample distribution of multidimensional inequality indices. We also present a simple method for computing standard errors and obtain explicit formulas in the context of two fam...Read more...

August 2008

DARP Paper

Inequality Measurement for Ordered Response Health Data

Ramses H. Abul Naga and Tarik Yalcin

When health status is an ordered response variable, Allison and Foster (2004) postulate that a distribution Q ?exhibits more inequality than a distribution P ?if Q ?is obtained from P ?via a sequence of median preserving...Read more...

June 2007

DARP Paper

Decomposition of Bivariate Inequality Indices by Attributes

Ramses H. Abul Naga and Pierre-Yves Geoffard

We provide, for the class of relative bidimensional inequality indices, a decomposition of inequality into two univariate Atkinson-Kolm-Sen indices and a third statistic which depends on the joint distribution of resourc...Read more...

February 2006

DARP Paper

Intergenerational Mobility in Britain: Revisiting the Prediction Approach of Dearden, Machin and Reed

Ramses H. Abul Naga and Frank A Cowell

The 'prediction approach' proposed by Dearden, Machin and Reed (DMR) consists in (1) regressing the observed incomes of the child and parent families on separate sets of predetermined variables, and (2) regressing the ch...Read more...

September 2002

DARP Paper

A Note on the Estimation of Intergenerational Income Correlations by the Method of Averaging

Ramses H. Abul Naga

Averaging methods are routinely used in order to limit biases resulting from the mismeasurement of permanent incomes. The Solon/Zimmerman estimator regresses a single-year measurement of the child's resources on a T-peri...Read more...

January 2001

DARP Paper

Galtonian Regression of Intergenerational Income Linkages: Biased Procedures, a New Estimator and Mean-Square Error Comparisons

Ramses H. Abul Naga

Because the permanent incomes of parents and children are typically unobserved, the estimation of the intergenerational correlation via the use of proxy variables entails an errors-in-variables bias. By solving a system ...Read more...

January 2001

DARP Paper

Estimating the Intergenerational Correlation of Incomes: An Errors in Variables Framework

Ramses H. Abul Naga

The estimation of the intergenerational correlation of incomes is usually carried out by proxying permanent incomes using suitable indicators of economic status, and by treating the resulting measurement error problem us...Read more...

July 1999

DARP Paper

Prediction and Determination of Household Permanent Income

Ramses H. Abul Naga and Robin Burgess

This paper is about the determination and prediction of permanent income in household data. Standard static welfare indicators (e.g. per capita expenditure and income) are imperfect in this respect as they typically cont...Read more...

November 1997

DARP Paper

Prediction and Sufficiency in the Model Factor Analysis

Ramses H. Abul Naga

We contrast two approaches to the prediction of latent variables in the model of factor analysis. The likelihood statistic is a sufficient statistic for the unobservables when sampling arises from the exponential family ...Read more...

November 1997

DARP Paper

The Allocation of Benefits underUncertainty: A Decision-Theoretic Framework

Ramses H. Abul Naga

We consider the problem of targeting benefits when the incomes of families are not accurately observable by the public authorities. By income uncertainty it is meant that the decision-maker cannot ascertain an applicant'...Read more...

May 1995

DARP Paper

Identifying the Poor: A Multiple Indicator Approach

Ramses H. Abul Naga

The standard approach to the study of poverty assumes the existence of an ideal variable that captures the extent of deprivation. In this paper we postulate that poverty is involved with many dimensions. We use a latent ...Read more...

June 1994