Sources of Inequality Between Male and Female Wages in Australia

This article examines the influence of labour force status, full-time/part-time employment status, educational qualifications, work experience, and occupation as sources of inequality between male and female wages in Australia. A decomposition method is used to identify the effect of these factors on male/ female inequality. This strategy involves successively removing persons who differ with respect to each of these factors from the population under study and then decomposing the inequality in the remaining sub-population into inequality within each sex and inequality between the sexes. This decomposition is done using the I₀ inequality index proposed by Theil (1967). The study is based on unit record data from the 1981–82 Income and Housing Survey conducted by the Australian Bureau of Statistics. It finds that a significant proportion of the inequality between the wages of the sexes can be explained by their differences with respect to the factors listed above.     

Factor decomposition of cross-country income inequality, 1960–1990

In this paper we present Esteban's 1994 [Esteban, J., 1994. La desigualdad interregional en Europa y en España: descripción y análisis. In: Esteban, J.M^a., Vives, X. (dirs.), Crecimiento y convergencia regional en España y en Europa, Vol. 2, Instituto de Análisis Económico] decomposition of the Theil index of inequality over per capita incomes into the (unweighted) sum of the inequality indices of (i) the productivity per employed worker, (ii) the employment rate, (iii) the active over working-age population rate, and (iv) the working-age over total population rate. Each of these factors clearly have different meanings for analysis as well as for policy. We apply this factoral decomposition to a set of 120 countries. We also contrast the empirical findings with the results obtained for the 23 OECD countries. [OECD, Labour Force Statistics, Several issues, Paris].     

Reviews

Book reviewed in this article:
Corporate Capital Investment: A Behavioural Approach , by P. Bromiley (Cambridge University Press. Cambridge, 1986)
Industrial Investment in Europe: Economic Theory and Measurement , edited by D. Weiserbs (Martinus Nijhoff, Dordrecht, the Netherlands, 1985)
Inflation and Unemployment: Theory, Experience and Policy-Making . edited by V. E. Argy and J. W. Nevile (Allen & Unwin. London, 1985)
Handbook of Natural Resource and Energy Economics , Vols I and II. edited by A. V. Kneese and J. L. Sweeney (North-Holland, Amsterdam, 1985)
Policies for Environmental Quality Control , edited by A. J. Jakeman, D. G. Day and A. K. Dragun (Centre for Resource and Environmental Studies. ANU, Canberra, 1985)     

Approximation and decomposition of Gini, Pietra–Ricci and Theil inequality measures

Two related problems are dealt with in this article, concerning some popular inequality indices proposed by Gini, Pietra?CRicci and Theil: (1) the calculation of the index when only a frequency distribution is available, thus needing some kind of approximation; and (2) a reasonable decomposition of the index calculated for a mixture, with components related to ??within?? and ??between?? inequalities, and possibly to the separate contributions of each group to the overall inequality. Beside the proposals arising from the specific structure of each inequality index, a general approach for identifying the within component is utilized, which is based on the fixation of a given number of fictitious individuals (called aggregate units), common to every group. Regarding the Gini index, a general expression is obtained for the approximation problem, while the within inequality is more easily managed by the recourse to aggregate units. The decomposition of the Pietra?CRicci index displays three components, clearly ascribable to within inequality, to a mixture effect and to a mean effect. Regarding the Theil index, some simple and very accurate approximation formulae are obtained. An application of all the indices and their decompositions has been made for the 2004 income distribution for Italy (Bank of Italy Survey).     

改革开放以来江苏省区域经济差异成因分析

改革开放以来,江苏省区域经济总差异扩大,苏南、苏中与苏北三大区域之间的差异与农村县域内部的差异越来越显著,且呈不断扩大的态势;区域经济差异的特征主要表现在经济规模、发展速度、发展水平和经济结构四个方面;引起区域经济差异的原因是复杂的、多元的,主要有历史因素、地理区位、区域发展策略、中心城市规模、人口数量与质量、全球化水平和市场发育程度等。通过逐步回归分析,得出区域发展策略是江苏省的区域经济增长的最主要因素,对区域差异的影响最大。     

Changing Contours of Income Stratification and Decomposition of Income Inequality: Evidence from Recent Longitudinal Survey in India

The paper, based on India Human Development Survey (IHDS) data, tries to address the question- how unequal is India in terms of income distribution? Accordingly, the paper examines the trends, levels, sources and factors of income inequality in India between 2005 and 2012. Three important results stemmed from our analysis. First, in this paper we use Gini as a measure of inequality and find that income inequality in rural India has increased from 0.50 to 0.54 between 2005 and 2012, whereas, in urban India income inequality has increased from 0.48 to 0.49 during the same period. Next and most importantly, we decompose income inequality by income sources and find that amongst different sources of income inequality; the contribution of farm income in total inequality has decreased from 35 percent in 2005 to 21 percent in 2012 in rural India. On the other hand, the contribution of salaried income in total inequality has plummeted drastically from 65 percent in 2005 to 16 percent in 2012 in urban India. Finally, we use Theil’s T index from the class of Generalized Entropy (GE) inequality measures, while decomposing income by four most important factors; namely, place of residence, social, educational and occupational groups. It is irrespective of these factors; the relative share of within-group inequality is not only much higher than that of between-group inequality, also its share has increased between these two periods. Thus, our paper suggests that these mutually reinforcing inequalities, in the long run, if not addressed effectively, will create a hard-hitting division between the privileged and the rest in Indian society.

     

Measuring Income Inequality in Euroland

In this paper we propose an aggregate measure of income inequality for the founding countries of the European Monetary Union. Applying the methodology of the Theil index we are able to derive a measure for Euroland as a whole by using complementary data from the European Community Household Panel and the Luxembourg Income Study. The property of additive decomposability allows us to determine each country's contribution as well as that of each demographic group to overall income inequality. In addition the impact of government transfers on this inequality measure is assessed.     

吉林省区域经济差异分析

考虑到测算吉林省区域差异的必要性,在分析有关区域差异内涵和理论的基础上,从理论方面,提出一种有关区域差异形成机制的假设,在实证研究方面,运用Theil指数的空间分解和基尼系数的产业分解两种方法,分析了吉林省1993—2003年这段时间内其区域差异的变化情况,最后简要分析了上述结果产生的原因,并提出一些建议。     

Public Sector Employment,Wage Inequality and the Gender Pay Ratio in the UK

This paper assesses the relative contributions of the different systems of pay determination in the private sector and the public sector toward the changing level of wage inequality and the gender pay ratio in the UK. The greater centralisation of pay arrangements in the public sector compared with the private sector in the UK suggests that public sector employment may have acted to offset the widening wage inequality seen in recent years, as well as making an important contribution to the increase in women's relative average earnings compared to men. This issue is addressed by drawing on unpublished occupational hourly earnings data from the New Earnings Survey and applying decomposition of the Theil index of wage inequality to analyse both static and dynamic trends. The change in wage inequality for the period 1986 to 1995 primarily reflected the change in wage dispersion within the private sector, and the narrowing of the gender pay gap among the public sector workforce was an important factor in explaining the overall improvement in women's relative earnings. The paper argues that the relatively centralised pay arrangements in the public sector, compared with the private sector, played an important role in slowing the increase in wage inequality and narrowing the gender pay gap. As such, future policies to decentralise pay determination in the UK public sector may exacerbate the increasing level of wage inequality and reverse women's recent relative pay improvements.     

An axiomatic characterization of the Theil measure of income inequality

This paper provides a characterization of a frequently used measure of income inequality. It has been known for some time that the Theil measure of income inequality (1) is consistent with the Lorenz criterion, when it applies, and (2) exhibits a simple and empricically useful decomposition by population subgroup into within-group and between-group terms. The major theorem establishes the converse: the decomposability property defines the Theil measure uniquely (up to a positive multiple) among all Lorenz-consistent measures.     

Ecological footprint inequality across countries: The role of environment intensity,income and interaction effects

Recently, White (2007) analysed the international inequalities in ecological footprints per capita (EF hereafter) based on a two-factor decomposition of an index from the Atkinson family (Atkinson, 1970). Specifically, this paper evaluated the separate role of environment intensity (EF/GDP) and average income as explanatory factors for these global inequalities. However, in addition to other comments on their appeal, this decomposition suffers from the serious limitation of the omission of the role exerted by probable factorial correlation (York et al., 2005). This paper proposes, by way of an alternative, a decomposition of a conceptually similar index like Theil's (1967) which, in effect, permits clear decomposition in terms of the role of both factors plus an inter-factor correlation, in line with Duro and Padilla (2006). This decomposition might, in turn, be extended to group inequality components (Shorrocks, 1980), an analysis that cannot be conducted in the case of the Atkinson indices. The proposed methodology is implemented empirically with the aim of analysing the international inequalities in EF per capita for the 1980–2007 period and, amongst other results, we find that, indeed, the interactive component explains, to a significant extent, the apparent pattern of stability observed in overall international inequalities.     

A Note on Reswitching and Intertemporal Prices

Abstract

Bliss (Capital Theory and Distribution of Income, Amsterdam/New York: North-Holland/Elsevier) claims that reswitching is nothing but an ‘optical illusion’ due to the exclusion of non-stationary price sequences from the analysis. This note develops this point. The standard case for choice of techniques and reswitching is reformulated in terms of Arrow-Debreu intertemporal prices and the conditions making these prices stationary are highlighted separately. It is then shown that the analysis of the choice of techniques in terms of ‘switch points’ requires stationary conditions.     

INEQUALITY OF OPPORTUNITY IN BRAZIL

This paper proposes a measure of the contribution of unequal opportunities to earnings inequality. Drawing on the distinction between "circumstance" and "effort" variables in John Roemer's work on equality of opportunity, we associate inequality of opportunities with five observed circumstances which lie beyond the control of the individual—father's and mother's education; father's occupation; race; and region of birth. The paper provides a range of estimates of the importance of these opportunity-forming circumstances in accounting for earnings inequality in one of the world's most unequal countries. We also decompose the effect of opportunities into a direct effect on earnings and an indirect component, which works through the "effort" variables. The decomposition is applied to the distribution of male earnings in urban Brazil, in 1996. The five observed circumstances are found to account for between 10 and 37 percent of the Theil index, depending on cohort and allowing for the possibility of biased coefficient estimates due to unobserved correlates. On average, 60 percent of this impact operates through the direct effect on earnings. Parental education is the most important circumstance affecting earnings, but the occupation of the father and race also play a role.     

Which Regional Inequality? The Evolution of Rural–Urban and Inland–Coastal Inequality in China from 1983 to 1995

This paper develops a unified empirical framework for describing the relative contribution of rural–urban and inland–coastal inequality to overall regional inequality in China during the 1980's and 1990's. The framework assesses rural–urban and inland–coastal inequalities from the same data set, presents results for a sufficiently long time period to transcend short-term fluctuations, allows for differential price changes, and applies a consistent notion of the contribution to inequality using a decomposition analysis. While the contribution of rural–urban inequality is much higher than that of inland–coastal inequality in terms of levels, the trend is very different. The rural–urban contribution has not changed very much over time, but the inland–coastal contribution has increased by several fold. The paper ends by investigating the role of labor migration in this outcome. J. Comp. Econom., December 1999, 27(4), pp. 686–701. Department of Agricultural, Resource, and Managerial Economics, 309 Warren Hall, Cornell University, Ithaca, New York 14853; International Food Policy Research Institute, 2033 K Street, NW, Washington, DC 20006.     

河北省区域经济差异实证分析

对河北省区域经济的绝对差异和相对差异分析显示:河北省区域经济发展不均衡差异逐步扩大。运用Theil指数的空间分解和基尼系数的产业分解方法分析产生区域差异的原因并以因子分析法综合评价其区域经济的差异性,说明政府应进一步统筹区域协调发展,以缩小区域经济发展过程中的差距。     

社会资本对收入水平及差异的影响是扩大还是减少*——来自12省份城市居民的样本

本文基于CHIP（中国家庭收入调查）（2002年）数据,实证研究了我国城市居民的社会资本对其收入水平和差异的影响。在其他条件相同的情况下,居民收入会随着自身社会资本的改善而提高。社会资本对收入差距的影响可以分解为两种不同的机制：（1）即使个体的社会资本相同,由于社会资本的收入回报率的异质性,社会资本在不同的收入群体中会产生扩大收入差距的影响;（2）给定社会资本的收入回报率相同,个体社会资本量的异质性也会扩大收入差距。笔者用分位数回归方法分析了社会资本的收入回报率在不同收入水平上的分布,从而验证了第一类机制。给定社会资本的收入回报率相同,使用夏普利值分解的方法发现,个体社会资本量的异质性会加剧收入差距的扩大,但是这一贡献并没有区域、行业特征等因素显著。随后的实证分析检验了社会资本对收入确实有提高作用,同时也分析出社会资本可能会缩小收入差距。这加深了我们对于社会资本在经济发展中微观机制的理解,并对制定消除收入差距的政策有指导意义。     

An axiomatic characterization of the Theil inequality ordering

We axiomatically characterize the Theil ordering of income inequality. In addition to the uncontroversial axioms of anonymity, homogeneity, replication invariance, strong directedness, and a standard continuity property, we appeal to both an independence and a decomposability axioms. These two axioms are ordinal implications of Theil decomposability, the central axiom in previous characterizations of the Theil index. To the best of our knowledge, the present is the first fully ordinal characterization of this index.     

FORCES SHAPING CHINA'S INTERPROVINCIAL INEQUALITY

This paper explores the forces that shaped China's interprovincial inequality in the last five decades of Communist rule. In so far as the change in interprovincial inequality is the result of differential growth in provincial GDP per capita and provincial economic growth, it may be decomposed into contributions by total factor productivity (TFP) and other factor inputs. A new method is introduced to make this decomposition. Care is exercised in taking into account problems of Chinese official data when implementing the decomposition analysis. The findings suggest that TFP and factor inputs exerted different and sometimes opposing effects on interprovincial inequality in the Maoist and reform era. The increase in inequality from the mid 1960s to the mid 1970s is due to the contribution of TFP overwhelming that of physical capital. The opposite is true for the 1980s. The increase in the 1990s is mainly driven by the skewed distribution of investments in favor of the richer coastal provinces reinforced by the increasing contribution of TFP.     

Changes in Inequalities of Access to Dental Care in Australia 1977–2005

Information on dental visits, income and demographic variables were drawn from the Australian National Health Survey between 1977 and 2005. Income‐related inequality in access to dental care was calculated using the generalised concentration index (G) and decomposition methods were employed to examine associations with socio‐demographic and policy‐amenable factors. Statistically significant increases in inequality in dental care use were found after 1995. From 0.026 in 1995, G increased to 0.045 in 2005. The associations between increases in inequality and changes in the uptake of private health insurance suggest a contributory role of the introduction of the Commonwealth government's 30 per cent rebate for private health insurance.     

医疗卫生基本公共服务的城乡差距及均等化路径

当前,我国城乡之间的医疗卫生服务不均等已成为一个重要的社会问题。本文通过医疗卫生费用和医疗卫生资源的城乡数据分析得出城乡之间的医疗卫生公共服务差距巨大,并通过2000—2008年城乡医疗保健费用的泰尔指数分析,发现城乡组间对城乡医疗卫生公共服务差距的贡献基本上在80%以上,几乎是组内差距贡献的4倍,而从两组的内部差距来看,农村内部的不均等程度要稍高于城市内部的不均等程度,根据分析结果并从财政向农村医疗卫生的投入倾斜、城乡医疗保险制度的整合、医疗体制的深化改革等方面就如何促进医疗卫生公共服务城乡均等化进行探讨。