Sources of Inequality: Measuring the Contributions of Income Sources to Rising Family Income Inequality

We develop a simulation method for measuring the impact of changes in the distributions of the main income sources on growth in family income inequality. We simulate the entire distribution of family income under the counterfactual, “What if the distribution of each source had not changed?” The simulation method allows us to evaluate the impact of changes at any point in the distribution as well as with multiple measures of inequality. We incorporate married‐couple and single‐person families, appropriately accounting for changes in the proportion married. We apply the simulation method to investigate the impact of changes in male earnings, female earnings, and capital income on the distribution of family income in the United States between 1969 and 1999. We find that changes in the distribution of male earnings account for more of the growth in family income inequality than do changes in any other source of income. Changes in the distribution of female earnings have reduced family income inequality.     

Inequality,Redistribution, and the Financial Crisis: Evidence from Distributional National Accounts for Austria

In this paper, we provide novel findings regarding the distributional effects of the global financial and economic crisis and how redistribution operated during this time, using detailed data for Austria. We construct distributional national accounts for the period 2004–2016 by combining survey data, tabulated tax data, and detailed national accounts data. The comprehensive data set allows us to analyze the distribution of macroeconomic income growth across the income distribution and to explore the evolution of income inequality over time. Our results suggest that as the distribution of growth changed over time, this had considerable repercussions for inequality, which started to decline at the very beginning of the economic and financial crisis, but increased again after 2012. We find that capital income largely determined both the level and the dynamics of income inequality. Government spending was found to play a key role for redistributive effects across the income distribution. In particular, in-kind transfers redistributed pre-tax income to a large extent. Our results show further that individuals with lower educational levels and younger individuals faced negative growth in pre-tax income over the years and also benefited considerably from redistribution.     

教育体系、收入分布与经济增长

本文使用一个包含物质资本与人力资本积累的世代交叠模型,研究不同的教育体系对经济增长的影响.我们发现,在公立教育体系下,最优的教育投资水平高于私立教育体系,收入差异也将会比在私立教育体系下下降得更快.因此,与私立教育体系相比,公立教育体系更有利于人力资本积累,在公立教育体系下一个国家将会有更高的经济增长率与更为平等的收入分布.     

创造性破坏与收入差距的振荡式扩大

本文试图运用熊彼特的技术创新和“创造性破坏”理论来解释收入差距振荡式扩大的动态特征。研究的结论是在以“创造性破坏”为特征的经济增长过程中,收入差距会扩大,而且创造性破坏的程度越强,经济增长速度越高,收入差距越大。其社会基础和原因是社会分工和阶层差异,这种差异会在经济增长过程中再度拉大。在方法上,本文用物理模型形象地描述了差距扩大过程,揭示了增长模型中定点状态分析方法的缺陷。对具体过程进行分析表明,收入差距扩大的方式为振荡式,这种振荡特征由个体和技术之间的动态竞争性质———“创造性破坏”决定。美国家庭收入的经验分析证实,在动态竞争的经济增长过程中,收入差距确实在振荡中扩大。     

Population increase,economic growth,educational inequality,and income distribution: some recent evidence

The relationship between population increase, economic growth, education and income inequality was examined in a cross-section study based on data from 26 developing and 2 developed countries. As other studies have noted, high population growth is associated with a less equal income distribution. A 1 percentage point reduction in the rate of population growth tends to raise the income share of the poorest 80% in the less developed world by almost 5 percentage points and is associated with a 1.7 percentage point increase in the income share of the poorest 40%. The relationship between short-run income growth and equality, on the other hand, is strong and positive. Estimates suggest that a 1 percentage point increase in the short-run rate of growth of the gross domestic product (GDP) increases the income share of the bottom 80% by about 2 percentage points and that of the poorest 40% by almost 1 percentage point. Although higher mean schooling appears to be a mild equalizer, educational inequality does not appear to have an adverse effect on income distribution. Overall, these results challenge the widely held belief that there must be a growth-equity trade-off. Moreover, they suggest that the impact of educational inequality on income distribution may be different from that observed in earlier studies, implying a need for caution in using these earlier results as a basis for educational policy development.     

Income inequality and economic growth

Despite the extensive existing literature on income inequality and economic growth, there remains considerable disagreement on the effect of inequality on economic growth. Existing literatures find either a positive or a negative relationship. In this paper, we attempt to theoretically examine that relationship with a stochastic optimal growth model. We make the disagreement clear within a single model. We conclude (i) that both are possible – that is, higher inequality can retard growth in the early stage of economic development, and can encourage growth in a near steady state, (ii) that income redistribution by high income tax does not always reduce income inequality. Income inequality can be reduced by higher income tax in a near steady state, but it cannot be reduced in the early stage of economic development, and (iii) that two government polices – rapid economic growth and low income inequality – can be achieved by low income tax in the early stage of economic development, but both cannot be achieved simultaneously in a near steady state.     

公共教育、社会保障与收入分布

本文使用一个世代交叠模型揭示了公共教育与社会保障调节收入分布的作用机制。研究发现,公共教育能够有效地缩小家庭教育投资差距,从而降低收入差异;社会保障则通过减少低收入家庭的劳动供给、增加其有效家庭教育时间来降低收入差异。本文的数值模拟结果显示,在同样的支出水平下公共教育调节收入差异的能力比社会保障更强。并且当存在财政预算约束时,从降低收入差异的角度来看,若财政预算规模较低则应当将资金优先用于公共教育;若财政预算规模较高则应当在公共教育与社会保障之间保持平衡。     

收入不平等对经济增长影响的实证研究

采用联立方程分析方法,实证分析了收入不平等对经济增长影响的三种机制,探讨了收入不平等如何通过影响物质资本投资、人力资本投资和居民消费来作用于经济增长。结果表明,从长期看收入不平等的扩大会刺激物质资本投资,但不利于人力资本投资和居民消费增长,收入不平等对经济增长的长期影响为负。因此,从经济发展的角度政府不应容忍收入不平等的过分扩大。     

Economic inequality in Spain: the european community household panel dataset

This article uses data from the 1998 European Community Household Panel to study economic inequality in Spain. It reports data on the Spanish distributions of income, labor income, and capital income, and on related features of inequality, such as age, employment status, educational attainment, and marital status. It also reports data on the income mobility of Spanish households, and data on income inequality in other European countries and in the US. We find that income, earnings, and, especially, capital income are very unequally distributed in Spain and that economic inequality in Spain is well above the European average.     

Measuring inequality change in an economy with income growth

This paper analyzes how to measure changes in inequality in an economy with income growth. The discussion distinguishes three stylized kinds of economic growth:

• 1.(1) high income sector enrichment,
• 2.(2) low income sector enrichment,
• 3.(3) high income sector enlargement, in which the high income sector expands and absorbs persons from the low income sector.

Th e two enrichment types pose no problem for assessing inequality change in the course of economic growth: for high income sector enrichment growth, inequality might reasonably be said to increase, whereas for low income sector enrichment, inequality might be said to decrease. These adjustments are non-controversial and non-problematical. Where problems arise is in the case of high income sector enlargement growth. In that case, the two alternative approaches have been shown in this paper to yield markedly results:

• 1.(1) The traditional inequality indices generate an inverted-U pattern of inequality. That is, inequality rises in the early stages of high income sector enlargement growth and falls thereafter.
• 2.(2) The new approach suggested here, based on axioms of gap inequality and numerical inequality, generates a U pattern of inequality. That is, inequality falls in the early stages of high income sector enlargement growth and rises thereafter.

The discrepancy between the familiar indices and the alternative approach based on axioms of gap inequality and numerical inequality bears further scrutiny. Two courses of action are possible. One might try to axiomatize inequality in ways that generate an inverted-U pattern in high income sector enlargement growth, thereby rationalizing the continued use of the usual inequality indices with the inverted-U property. Alternatively, one might retain the axioms proposed here, embed them into a more formal structure, and construct a family of inequality indices consistent with them. Others might wish to pursue the first course; I am at work on the second.     

ICT and income inequality: a cross-national perspective

The importance of information and communications technology (ICT) for economic growth and development is widely researched and seemingly well understood, but the effect of such investments on income inequality is less well documented. On the one hand, improvements in infrastructure are expected to expand economic opportunities for previously underserved populations. On the other hand, ICT growth may exacerbate inequality due to differential access and skill premiums. We use panel data from 109 countries during the period 2001–2014 to examine the empirical connection between ICT and income inequality in a cross-national context. Our results suggest that the effect of ICT on income inequality depends both on the specific type of ICT and on the measure of income inequality. In addition, the magnitude of ICT’s effect on income inequality is comparable to that of more traditional forms of economic infrastructure. Finally, we find that the association between ICT and income inequality is conditional on other economic and political characteristics.     

Growth versus equity: A CGE analysis for effects of factor-biased technical progress on economic growth and employment

With factor-biased technical progress described as labor-saving and skill-biased technical changes, there are concerns that technological innovation can lead to unemployment and widen inequality in the economy. This study explores impacts of factor-biased technical changes on the economic system in terms of economic growth, employment, and distribution, using a computable general equilibrium (CGE) model. The results show that technological innovation contributes to higher level of economic growth with productivity improvements. However, our analysis suggests that economic growth accompanied by skill- and capital-biased technical progress disproportionately increases demand for capital and high-skilled labor over skilled and unskilled labor. This shift in the value-added composition is found to deepen income inequality, as more people in higher income groups benefit from skill premium and capital earnings. Our results suggest that policymakers should prepare a wide range of policy measures, such as reforms in educational programs and taxation systems, in order to ensure sustainable growth.     

The eye of the beholder. Reconsidering the notions of pro‐poor growth and progressivity,with an application to Vietnam

Both policymakers and economists have tried to find criteria to assess whether economic growth is pro‐poor. In this paper we reconsider the inequality‐oriented approach originally proposed by Jenkins and Van Kerm. They look at the changes in the whole income distribution, and decompose the change in income inequality, measured by the Gini coefficient, into a progressivity and a reranking component. They define a pro‐poor (or progressive) change as one where the changes in income are more to the benefit of those who are initially poor than to the benefit of those who are initially rich. We challenge this assumption, and maintain that also the point of view of the finally poor and the finally rich should be taken into account when evaluating whether growth is pro‐poor. We suggest a new decomposition method, based on an inequality index of the generalized entropy family, which allows the change in income inequality to be decomposed exactly into a forward‐looking and a backward‐looking progressivity component. Our empirical illustration, using data from household surveys in Vietnam, shows that economic growth in Vietnam has been pro‐poor from a forward‐looking perspective, but not from a backward‐looking perspective.     

存在收入差异的社会保障制度选择--基于一个内生增长世代交替模型

社会保障制度选择是经济协调发展中的重要课题.本文建立了一个考虑存在收入差距的异质性个体的内生增长世代交替模型,综合考察了社会保障制度选择对经济增长和收入再分配的影响.分析表明,现收现付制对稳定状态的经济增长率有负面影响,但其收入再分配功能对提高社会总福利存在正向作用,通过数值模拟发现当收入差距较小时,现收现付制对经济增长的抑制作用较强,随着收入差距的拉大,收入再分配功能将逐渐居于主导地位,其综合效应可以改善社会福利.在一定的收入差异程度范围内,存在一个使社会福利最大化的最优现收现付制比率.基于对中国实际的分析,本文认为我国未来的社会保障制度改革应该注重发挥现收现付制的再分配功能.     

INEQUALITY AND GROWTH: FROM MICRO THEORY TO MACRO EMPIRICS

We show that the way individual income data should be aggregated into an index of inequality in order to explain countries' growth performance is theory specific. A simulation set‐up shows that the use of a wrong measure might obscure the inequality–growth relationship and that the relative performance of different measures of inequality can be informative about the channel through which inequality influences economic growth.     

Income inequality and economic growth in an open economy

Income inequality has a strong impact on fiscal policy when majority voting enables those individuals with less-than-average income to decide on tax rates. This study analyzes the impact on economic growth of income inequality in an open economy where tax revenues are partially used for international transfers. In any case, income inequality is harmful for growth. In an economic union, positive effects of international integration raise the growth rate as long as net transfers do not grow proportionally. In a political union, unionwide voting makes distributive politics depending on the union's median voter. In this case, additional output growth on aggregate level is a necessary, but not sufficient condition for a majority of voters to accept union membership.     

收入分配不平等、有效需求与经济增长——一个基于中国经济转型期的实证研究

本文从有效需求角度入手,探究中国经济转型期经济增长与收入分配不平等之间的关系,并运用中国1978-2005年间28个省市的面板数据,通过面板数据单位根检验、协整检验与误差修正模型,对中国经济增长与收入分配不平等、有效需求、劳动力、投资、教育以及收入分配不平等和有效需求交互影响之间的长期关系和短期关系进行了研究。结果显示,中国经济转型期经济增长与收入分配不平等、有效需求具有长期的均衡关系,收入分配不平等通过有效需求机制阻碍了经济增长,且在短期内效果也非常显著。     

DEMOGRAPHIC TRENDS AND CONSUMPTION INEQUALITY IN AUSTRALIA BETWEEN 1975 AND 1993

We examine trends in consumption inequality among Australian households using the Australian Bureau of Statistics Household Expenditure Surveys collected over the period 1975 to 1993. We find that the distribution of consumption is much more equal than that of income and that both income and consumption inequality rose by significant amounts over the period. However, consumption inequality rose by much less (the Gini coefficient for income inequality rose by 17 percent while that for nondurable consumption rose by 9 percent). We then examine the effects of demographic trends, specifically population aging and changing family structures, and find they account for only a minor fraction in the overall growth in economic inequality.     

收入不平等与经济增长：移动的库兹涅茨曲线*——新时期收入分配改革的思路与意义

准确判断收入不平等对经济增长的影响，对于客观评价中国各个阶段的收入分配制度改革尤为重要。本文在统一增长理论的框架下引入收入不平等因素，构建了一个人口数量、不平等和经济增长同时内生的理论模型，并利用CGSS数据构造收入不平等指标，使用中国省际非平衡面板数据进行经验检验。研究发现：收入不平等与经济增长之间呈现倒U型关系。更重要的是，随着经济发展水平的提高，倒U型曲线将逐渐向左移动，即最优的收入不平等程度随着经济发展水平的提高而逐渐降低。这一发现意味着改革开放以来，中国各个时期的收入分配制度改革均是在特定历史条件下的最优选择。本文的结论具有深刻的政策含义：为了提高经济增长率，需要进一步巩固“脱贫攻坚”成果，逐渐加大收入分配调节力度，使收入分配制度改革紧跟经济发展的步伐，根据经济发展水平不断缩小收入不平等程度。     

内生经济增长理论框架下的市场失效与财政政策

内生经济增长理论认为,知识和人力资本的外部效应与创新带来的垄断势力推动经济增长的同时,也会带来非帕雷托最优的经济增长收入分配的不公平,将阻碍经济增长;加快知识和人力资本积累、促进技术进步以及缓解收入分配不公平的财政政策能纠正市场失效,使长期经济增长达到社会最优.