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Social Indicators Research

Erschienen in:

01.07.2014

Was Pro-Poor Economic Growth in Australia for the Income-Poor? And for the Multidimensionally-Poor?

verfasst von: Francisco Azpitarte

Erschienen in: Social Indicators Research | Ausgabe 3/2014

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Abstract

We investigate the pro-poorness of Australia’s strong economic growth in the first decade of the twenty-first century using anonymous and non-anonymous approaches to the measurement of pro-poor growth. The sensitivity of pro-poor growth evaluations to the definition of poverty is evaluated by comparing the results for the standard income-poverty measure with those based on a multidimensional definition of poverty. We find that Australian growth in this period can be only categorized as pro-poor according to the weakest concept of pro-poorness that does not require any bias of growth towards the poor. In addition, our results indicate that growth was clearly more pro-income poor than pro-multidimensionally poor. Counterfactual distribution analysis reveals that differences in the distribution of health between these two groups is the non-income factor that most contributes to explain this result.

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Ranking derived using the series of GDP at purchasing power parity per capita elaborated by the OECD and available at http://stats.oecd.org/Index.aspx.

Some of the results presented in this paper were already discussed in Azpitarte (2013). This is an improved and augmented version with new results that were not available by the time the first version was written.

Because of the changes in the methodology used by the ABS, the estimates for 2007–2010 are not directly comparable with those for previous years. The comparison of the figures for 2000 and 2010 suggests an even larger increase than the one observed for the period 2000–2007.

Groll and Lambert (2012) show using simulation analysis with parametric distributions that pro-poor growth generally leads to a decline in relative inequality. There exist, however, pro-poor growth patterns that exacerbate inequality.

For a discussion on the development of social exclusion agenda in Australia and its relationship with the policy initiatives in Europe and the UK see Scutella et al. (2009a).

As it is common in the pro-poor literature, we will assume that the poverty line remains constant in real terms over time. Deutsch and Silber (2011) analyse the pro-poorness of growth in Israel between 1990 and 2006 considering alternative ways of defining the poverty line and concepts of pro-poor growth. They find that although these choices affect the results, the overall characterization of the growth pattern is robust to these choices.

For the FGT _α family the individual poverty function is equal to \(\theta (y,z)=(\frac{z-y}{z})^{\alpha }\), where α is the parameter of inequality aversion. When α is set equal to 0,1, or 2, this expression leads to the headcount measure, the poverty gap ratio and the severity of poverty index, respectively. In the case of the Watts index the poverty function is given by \(\theta (y,z)=Ln(\frac{z}{y}).\)

In particular, this Theorem covers any poverty measure P whose individual poverty function is decreasing and convex. The headcount index clearly fails to satisfy this property.

These necessary conditions correspond to the case of positive income growth. This is precisely the type of growth observed in Australia for the period under analysis so we decided not to discuss the case of negative growth. For more on this see Essama-Nssah and Lambert (2009).

This is defined as the area under the GIC up to the headcount index divided by the headcount measure, and it can be expressed as \(\frac{1}{H}\int_{0}^{H}g(p)dp\).

When P is set equal to the Watts index of poverty, then the \(PEGR=\frac{1}{H}\int_{0}^{H}g(p)dp\), where the term on the right hand side is the pro-poor growth index proposed by Ravallion and Chen (2003).

Grimm’s original formulation is in terms of the initial income of individuals. However, the framework is still valid when \(\Upomega _{t-1}\) refers to any other welfare indicator.

Differently to the anonymous pro-poor growth measures, to the best of our knowledge no formal relationship between the anonymous measures and the variation of a particular poverty measure has been established in the literature.

For a detailed description of the HILDA sample see Wooden and Watson (2007).

The use of weights is particularly necessary for the longitudinal analysis due to the non-randomness of non-response patterns. A discussion on this issue is presented later in Section 5.2.

Estimation results for alternative values of θ not presented here are available upon request.

Interestingly, this shift did not lead to a significant change in social spending. This does not necessarily mean there was no welfare state retrenchment. Indeed, as Korpi and Palme (2003) show, replacement rates in the sickness and unemployment insurance programs in Australia substantially declined for the period 1975–1995. Unfortunately, no similar evidence is available for more recent periods.

A key feature of the Australian Social Security System is the categorization of welfare payments into two groups: pensions and allowances. Pensions are meant for long-term support for those who are not expected to sustain themselves through paid work including mature-aged individuals and people with long-term health conditions and disability. Allowances are designed to be a transitional payment for those with capacity to work but are temporarily out of the labour market. Relative to pensions, allowances are paid at lower rates, face tighter means-tests and have more participation requirements. For more details on the structure of cash-transfers and its recent evolution see Herscovitch and Stanton (2008) and Australian Senate (2012).

These and all the other estimates of pro-poor growth measures presented in this section were computed using the Distributive Analysis Stata Package developed by Araar and Duclos (2007).

From Kakwani and Son (2008) we know that the growth rate in the mean, γ, is always less than the threshold \(\bar{\gamma}\) defined by these authors to characterize absolute pro-poor growth. Therefore, PEGR < γ implies that growth was not absolute pro-poor either.

The choice of the cent cut-off points is completely arbitrary. Alternative thresholds for the bottom, middle, and top parts were considered and the main conclusions from the analysis remained unaltered.

The extent to which this increase was due to the changes in the Australian social policy described above is an interesting issue that has not been analyzed yet.

The comparison of our results with those from the literature on top income shares must be taken cautiously. The unit of analysis in this literature is usually the individual as results are based on records of personal income tax. Furthermore, the income variable used in these studies is gross income before tax. The figures presented here, however, refer to the distribution of disposable income and were derived by assigning each individual the equivalent income of her household.

These authors analyze long-run trends using income tax data for the period from 1921 up to 2003.

For more on these issues see the “Appendix”.

Importantly, the larger growth of the income-poor could just be a consequence of the greater income mobility among those at the bottom of the distribution. To the best of our knowledge no methodological framework capable of distinguishing the effects of growth and income mobility on the pro-poorness of growth has been proposed yet. We propose a procedure that allows us to control for the income-mobility due to normal life-cycle income growth and the initial income conditions. As shown in the “Appendix”, we find that the main conclusions from the pro-poor analysis do not change when we control for these sources of mobility.

All the results presented in this section correspond to the 15 % cut-off. Robustness checks carried out using the 5, 10, 20, 25, and 30th percentiles as thresholds yield similar results available upon request.

For both the Oaxaca–Blinder and the DFL regression decompositions, e(S) is obtained setting all the other coefficients but those of the covariates in S equal to zero.

Notice the aim of this analysis is to evaluate the contribution of the differences in the distribution of observed characteristics between the two poor groups to explain the growth gap. The econometric specifications are simply thought to identify the statistical association between individuals’ characteristics and benefits from growth. Issues of endogeneity and selection bias were not addressed which implies that no causal relationship can be assessed from our results.

These are Sydney, other regions of New South Wales, Melbourne, other areas of Victoria, Brisbane, rest of Queensland, Adelaide, other regions of South Australia, Perth, rest of Western Australia, Tasmania, Northern Territory, and Australian Capital Territory.

The general, physical, and mental health indices take values between 0 and 100 and are based on the SF-36 Health Survey included in HILDA.

The results of the multiple regressions run to evaluate the contribution of each group of characteristics are not presented in the “Appendix”, but are available upon request.

Note this conterfactual exercise provides an estimate of the income gains of the multidimensionally-poor assuming the characteristics of the income-poor. This implies that differences in returns between these two groups are weighthed by the characteristics of the income-poor. To check the robustness of the results we also estimated the alternative decomposition which weights differences in returns by the characteristics of the multidimensionally-poor. The results of this exercise, available upon request, are consistent with the ones presented here.

The incidence of people with indigenous background is slightly higher among the multidimensionally-poor (3.1 vs. 2.3 %).

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Titel: Was Pro-Poor Economic Growth in Australia for the Income-Poor? And for the Multidimensionally-Poor?
verfasst von: Francisco Azpitarte
Publikationsdatum: 01.07.2014
Verlag: Springer Netherlands
Erschienen in: Social Indicators Research / Ausgabe 3/2014
Print ISSN: 0303-8300
Elektronische ISSN: 1573-0921
DOI: https://doi.org/10.1007/s11205-013-0378-8

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