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Beyond unidimensional poverty analysis using distributional copula models for mixed ordered‐continuous outcomes

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Listed:
  • Maike Hohberg
  • Francesco Donat
  • Giampiero Marra
  • Thomas Kneib
Abstract
Poverty is a multidimensional concept often comprising a monetary outcome and other welfare dimensions such as education, subjective well‐being or health that are measured on an ordinal scale. In applied research, multidimensional poverty is ubiquitously assessed by studying each poverty dimension independently in univariate regression models or by combining several poverty dimensions into a scalar index. This approach inhibits a thorough analysis of the potentially varying interdependence between the poverty dimensions. We propose a multivariate copula generalized additive model for location, scale and shape (copula GAMLSS or distributional copula model) to tackle this challenge. By relating the copula parameter to covariates, we specifically examine if certain factors determine the dependence between poverty dimensions. Furthermore, specifying the full conditional bivariate distribution allows us to derive several features such as poverty risks and dependence measures coherently from one model for different individuals. We demonstrate the approach by studying two important poverty dimensions: income and education. Since the level of education is measured on an ordinal scale while income is continuous, we extend the bivariate copula GAMLSS to the case of mixed ordered‐continuous outcomes. The new model is integrated into the GJRM package in R and applied to data from Indonesia. Particular emphasis is given to the spatial variation of the income–education dependence and groups of individuals at risk of being simultaneously poor in both education and income dimensions.

Suggested Citation

  • Maike Hohberg & Francesco Donat & Giampiero Marra & Thomas Kneib, 2021. "Beyond unidimensional poverty analysis using distributional copula models for mixed ordered‐continuous outcomes," Journal of the Royal Statistical Society Series C, Royal Statistical Society, vol. 70(5), pages 1365-1390, November.
    • Handle: RePEc:bla:jorssc:v:70:y:2021:i:5:p:1365-1390
    DOI: 10.1111/rssc.12517
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    References listed on IDEAS

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