Inadequate Bivariate Measures of Health Inequality: The Impact of Income Distribution*

Bivariate measures of health inequality are influenced by changes in two variables: health and a socioeconomic variable, such as income. For these measures, what is reported as an increase in health inequality might just as well be a reduction in income inequality. In particular, several papers have found that socioeconomic health inequalities in Nordic countries are no less than in other European countries. The correct interpretation could just be that income inequality is no higher in Nordic countries than in the rest of Europe. The problem is especially profound when the causality is running from health to income.     

Natural Resource Booms and Inequality: Theory and Evidence*

We develop a theory, in the context of a two‐sector growth model in which learning‐by‐doing drives growth, to explain the time path of income inequality following natural resource booms in resource‐rich countries. Under the condition of a relatively unskilled labor intensive non‐traded sector, inequality falls immediately after a boom, and then increases steadily over time until the initial impact of the boom disappears. Using data for 90 countries between 1965 and 1999, we find evidence in support of the theory, especially for oil and mineral booms. We also find that uncertainty about future commodity prices increases long‐run inequality.     

Income Inequality and Economic Growth: Evidence from American Data

While most cross-country studies find a negative relationship between income inequality and economic growth, studies that use panel data suggest the presence of a positive relationship between inequality and growth. This paper uses a cross-state panel for the United States to assess the relationship between inequality and growth. Using both standard fixed effects and GMM estimations, this paper does not find evidence of a positive relationship between inequality and growth but finds some evidence in support of a negative relationship between inequality and growth. The paper, however, shows that the relationship between inequality and growth is not robust and that small differences in the method used to measure inequality can result in large differences in the estimated relationship between inequality and growth.     

Consumption risk, technology adoption and poverty traps: Evidence from Ethiopia

Much has been written on the determinants of technology adoption in agriculture, with issues such as input availability, knowledge and education, risk preferences, profitability, and credit constraints receiving much attention. This paper focuses on a factor that has been less well documented: the differential ability of households to take on risky production technologies for fear of the welfare consequences if shocks result in poor harvests. Building on an explicit model, this is explored in panel data from Ethiopia. Historical rainfall distributions are used to identify consumption risk. Controlling for unobserved household and time-varying village characteristics, it emerges that not just ex ante credit constraints, but also the possibly low consumption outcomes when harvests fail, discourage the application of fertilizer. The lack of insurance or alternative means of keeping consumption smooth leaves some trapped in low return, lower risk agriculture, one of the mechanisms through which poverty perpetuates itself in agrarian settings.     

Inflation‐Growth Profiles Across Countries: Evidence from Developing and Developed Countries

There is growing evidence from multi‐country studies indicating that there is a turning point in the relationship between inflation and economic growth beyond which the detrimental effects of high inflation offset the stimulating effects of mild inflation on growth. However, it is not clear whether it is appropriate to assume an identical turning point in the inflation and growth relation across countries at various stages of development. Using a non‐linear specification and the data from four groups of countries at various stages of development, this paper examines the possibility for a family rather than a single inverted U relation across countries at various stages of development. The estimated turning points are found to vary widely from as high as 15% per year for the lower‐middle‐income countries to 11% for the low‐income countries, and 5% for the upper‐middle‐income countries. No statistically detectable, long‐run relationship between inflation and growth is evident for the OECD countries. The results indicate the potential bias in the estimation of inflation–growth nexus that may result from combining various countries at different levels of development. The existence of such a degree of heterogeneity across countries at various stages of development also suggests the inappropriateness of setting a single, uniform numerical policy target applicable to all (developing) countries.     

Moral hazard and Marshallian inefficiency: Evidence from Tunisia

We formalize the link between optimal cost-sharing contracts and the production technology in the presence of moral hazard by appealing to several well-known results from duality theory. Building on intuitions from the interlinkage literature, we show that optimal contractual structure is determined by the (i) substitution possibilities that exist between different observable factor inputs, as well as (ii) between these inputs and unobservable effort. We endogenize contractual choice using landlord characteristics as instruments, exploiting the fact that, in our dataset, landlords interact with several tenants and vice versa. The approach is applied to an unbalanced plot-level panel of cost-sharing contracts in a Tunisian village, using a translog representation of the restricted profit function. Contractual terms are found to be a significant determinant of input use and therefore lead to Marshallian inefficiency, while the optimality of the underlying contractual structure is rejected.     

Income and Wealth Inequality in Asia and the Pacific: Trends,Causes, and Policy Remedies

The Asia–Pacific region's rapid growth and poverty reduction in recent decades have been accompanied by rising income and wealth inequality. Technological progress, globalization, deregulation and market-oriented reform, and financialization have generated many new opportunities, but rewarded capital more than labor, benefited skilled workers more than the unskilled, widened spatial inequality, and produced a growing number of the superrich. For some countries, population aging has also contributed to rising inequality. The present paper provides an update on recent trends of income and wealth inequality in the Asia–Pacific region, examines causes behind rising inequality, and discusses policy actions needed to tackle inequality. It also assesses how the COVID-19 has likely worsened inequality in the region.     

Relative Income and Indebtedness: Evidence from Panel Data

We examine patterns of indebtedness in the Panel Study of Income Dynamics, focusing on the period surrounding the housing bubble and its aftermath (i.e., 1999–2009). Leverage increased across households, but most quickly among lower income households during this period. We find additionally that leverage grew faster for households with lower relative income compared to other households in similar demographic groups or within a state controlling for own income. Together, these findings provide evidence for the thesis that the rising indebtedness of households in the U.S. is related to high levels of inequality, and that “Veblen effects,” whereby relative income matters for individual well‐being and decisions, may contribute to rising household indebtedness.     

税收与收入分配:基于发展中国家个人所得税的思考

对于税收分配作用的不同理解和看法导致了税制设计方案的差异。发达国家普遍采用的累进综合个人所得税在发展中国家里面临着更高的管理成本、遵从成本、经济效率成本和政治成本,因而可能不是发展中国家实现收入分配职能的最优策略。对于中国而言,未来个人所得税的改革方向应当是在合理确定劳动所得和资本所得税负水平的基础上,根据纳税人家庭人口数量及就业状况对费用减除标准加以细分。在商品税方面,对日常生活必需品和农业生产资料免征增值税,将更多奢侈品纳入消费税的征收范围,并对与低收入群体日常生活密切相关的服务项目免征营业税。     

Recent Technological and Economic Change among Industrialized Countries: Insights from Population Growth*

Cross‐country observations on the effects of population growth are used to show why differences in rates of growth in working‐age population may be a key to understanding differences in economic performance across industrialized countries over the period 1975–1997 versus 1960–1974. In particular, we argue that countries with lower rates of adult population growth adopted new capital‐intensive technologies more quickly than their high population growth counterparts, therefore allowing them to reduce their work time without deterioration of growth in output‐per‐adult.     

Heterogeneity in Consumer Demands and the Income Effect: Evidence from Panel Data

This paper uses unique Spanish panel data on household expenditures to test whether unobservable heterogeneity in household demands (taste, etc.) is correlated with total expenditures (income). The main finding is that tastes are indeed correlated with income for about half of the goods considered, implying that cross‐sectional estimates of income elasticities for these goods are biased. The goods are the following: food eaten outside home, alcohol and tobacco, transportation, and energy. The elasticity of alcohol and tobacco is more than halved when taking unobserved heterogeneity into account. For transportation, the bias is sufficiently large to misclassify the good as a luxury.     

Technology clubs, R&D and growth patterns: Evidence from EU manufacturing

This paper investigates the forces driving output change in a panel of EU manufacturing industries. A flexible modeling strategy is adopted that accounts for: (i) inefficient use of resources and (ii) differences in the production technology across industries. With our model we are able to identify technical, efficiency, and input growth for endogenously determined technology clubs. Technology club membership is modeled as a function of R&D intensity. This framework allows us to explore the components of output growth in each club, technology spillovers and catch-up issues across industries and countries.     

Income Inequality and Political Polarization: Time Series Evidence Over Nine Decades

Rising income inequality and political polarization have led some to hypothesize that the two are causally linked. Properly interpreting such correlations is complicated by multiple factors driving these phenomena, potential feedback between inequality and polarization, measurement issues, and the statistical challenges of modeling non‐stationary variables. We find that a more precise measure of inequality (the inverted Pareto–Lorenz coefficient) is more consistently and statistically related to polarization in the short and long runs than the less precise top 1 percent share of income. We find bi‐directional causality between polarization and inequality, consistent with theoretical conjecture and less formal evidence in previous studies.     

Inequality of opportunity and mass incidents: Evidence from China

This paper is one of the first to quantitatively analyse the relationship between inequality of opportunity and social stability in the context of China. Utilizing Census data of 2005 and the data of recorded mass incidents, we find a positive and robust correlation between inequality of opportunity and the outbreak of mass incidents. Amongst different types of mass incidents, inequality of opportunity displays the most significant correlation with those involving the government and the public. We also identify the lack of trust and higher unemployment as two potential channels through which inequality of opportunity exerts impacts on the happening of mass incidents.     

The Uncertainty of Academic Rent and Income Inequality: The OECD Panel Evidence

The article presents an alternative view on the education—income inequality relationship, which calls into question the neoclassical claim that education increases labor productivity and hence contributes to a higher output, wage and consequently more even income distribution. In the context of public policies, education needs to be seen not only as a factor of income mobility, but also as a “positional good,” which benefits graduates at the expense of non-graduates. Education generates “academic rent,” by which we mean uneven remuneration of workers based on academic signs of distinctions that do not necessarily reflect differences in productivity. Using the robust panel model on a sample of OECD (Organization of Economic Co-operation and Development) countries from 1980 to 2015, we show that investments in human capital lead to lower inequality, but overinvestments tends to increase income inequality, which may be related to academic rent. In discussing this result, we consider that uncertainty of academic rent under the condition of a rapid transformation of the workplace caused by the fourth industrial revolution.     

贸易开放与发展中国家收入差距扩大——基于中国的理论与实证分析

文章将人力资本结构因素纳入到贸易开放与发展中国家内部收入差距关系的分析框架之中,通过理论推理和实证检验考察了贸易开放、人力资本结构对发展中国家收入差距扩大的影响机制、条件与力度.研究表明,贸易开放对发展中国家收入差距扩大的影响不但与其所带来的技术进步类型有关,还与该国的产业发展战略和人力资本(人才供给)结构密切相关.就我国而言,人力资本结构升级速度慢于贸易产品结构升级速度,是贸易尤其是出口导致收入差距扩大的重要条件.     

Trade and Rural-Urban Income Inequality: Evidence from China

Using the provincial panel data from 1978 to 2007, this paper makes an empirical analysis of the relationship between international trade and rural-urban income inequality in China. The results show that international trade has a fundamental impact on rural-urban income inequality. For the whole country, the development of international trade from 1978 to 2007 enlarged the rural-urban income gap. During the three different periods (defined in section 3.3), the impact was also noticeable in terms of extent, direction and significance respectively at the national and regional levels. During the three periods, the relationship has an inverted “U” shape for China as a whole, central China and western China, but for eastern China the relationship has a “U” shape. At the same time, exports and imports have different influences on the rural-urban income gap in China, the influences were also different across regions; and the imports has had a more significant influence on these regions than exports has had.     

Accounting for United States Household Income Inequality Trends: The Changing Importance of Household Structure and Male and Female Labor Earnings Inequality

Using a shift‐share analysis on March CPS data, this paper estimates the degree to which changes in labor earnings, employment, and marriage patterns account for household income inequality growth in the United States since 1979. The factors contributing to the rapid rise in income inequality in the 1980s differ substantially from those contributing to its slower increase since that time. Unlike findings for the 1980s when changes in the correlation of spouses' earnings accounted for income inequality growth, this factor is no longer a major contributor toward its continued increase. Additionally, the 2000s business cycle is the first full business cycle in at least 30 years where changes in earnings of male household heads accounted for declines in income inequality. Instead, the continued growth in income inequality in the 2000s was accounted for primarily by increases in female earnings inequality and declines in both male and female employment.     

Inequality of Income and Consumption in the U.S.: Measuring the Trends in Inequality from 1984 to 2011 for the Same Individuals

This paper examines the distribution of income and consumption in the U.S. using one dataset that obtains measures of both income and consumption from the same set of individuals. We develop a set of inequality measures that show the increase in inequality during the past 27 years using the 1984–2011 Consumer Expenditure Survey. We find that the trends in income and consumption inequality are similar between 1984 and 2006, and diverge during and after the Great Recession. For the entire 27‐year period we find that consumption inequality increases almost as much as does income inequality.     

Inflation and the Income Share of the Rich: Evidence for 14 OECD Countries

This paper examines the distributional implications of inflation on top income shares in 14 advanced economies using data over the period 1920–2016. We use local projections to analyze how top income shares respond to an inflation shock, and panel regressions in which all variables are defined as 5-year averages to examine the impact of inflation on the position of the top-one-percent in the long run. Our findings suggest that inflation reduces the share of national income held by the top 1 percent. Furthermore, we find that inflation shocks and long-run inflation have similar effects on top income shares.