Publication:
Effects of Income Inequality on Aggregate Output

Loading...
Thumbnail Image
Files in English
English PDF (667.09 KB)
1,709 downloads
English Text (71.91 KB)
68 downloads
Date
2015-06
ISSN
Published
2015-06
Editor(s)
Abstract
This paper estimates the effect of income inequality on real gross domestic product per capita using a panel of 104 countries during the period 1970–2010. The empirical analysis addresses endogeneity issues by using instrumental variables estimation and controlling for country and time fixed effects. The analysis finds that, on average, income inequality has a significant negative effect on transitional gross domestic product per capita growth and the long-run level of gross domestic product per capita. However, the impact varies by the level of economic development, so much so that in poor countries income inequality has a significant positive effect on gross domestic product per capita.
Link to Data Set
Citation
Brueckner, Markus; Lederman, Daniel. 2015. Effects of Income Inequality on Aggregate Output. Policy Research Working Paper;No. 2317. © World Bank. http://hdl.handle.net/10986/22203 License: CC BY 3.0 IGO.
Associated URLs
Associated content
Report Series
Report Series
Other publications in this report series
  • Publication
    The Future of Poverty
    (Washington, DC: World Bank, 2025-07-15) Fajardo-Gonzalez, Johanna; Nguyen, Minh C.; Corral, Paul
    Climate change is increasingly acknowledged as a critical issue with far-reaching socioeconomic implications that extend well beyond environmental concerns. Among the most pressing challenges is its impact on global poverty. This paper projects the potential impacts of unmitigated climate change on global poverty rates between 2023 and 2050. Building on a study that provided a detailed analysis of how temperature changes affect economic productivity, this paper integrates those findings with binned data from 217 countries, sourced from the World Bank’s Poverty and Inequality Platform. By simulating poverty rates and the number of poor under two climate change scenarios, the paper uncovers some alarming trends. One of the primary findings is that the number of people living in extreme poverty worldwide could be nearly doubled due to climate change. In all scenarios, Sub-Saharan Africa is projected to bear the brunt, contributing the largest number of poor people, with estimates ranging between 40.5 million and 73.5 million by 2050. Another significant finding is the disproportionate impact of inequality on poverty. Even small increases in inequality can lead to substantial rises in poverty levels. For instance, if every country’s Gini coefficient increases by just 1 percent between 2022 and 2050, an additional 8.8 million people could be pushed below the international poverty line by 2050. In a more extreme scenario, where every country’s Gini coefficient increases by 10 percent between 2022 and 2050, the number of people falling into poverty could rise by an additional 148.8 million relative to the baseline scenario. These findings underscore the urgent need for comprehensive climate policies that not only mitigate environmental impacts but also address socioeconomic vulnerabilities.
  • Publication
    Exports, Labor Markets, and the Environment
    (Washington, DC: World Bank, 2025-07-14) Góes, Carlos; Conceição, Otavio; Lara Ibarra, Gabriel; Lopez-Acevedo, Gladys
    What is the environmental impact of exports? Focusing on 2000–20, this paper combines customs, administrative, and census microdata to estimate employment elasticities with respect to exports. The findings show that municipalities that faced increased exports experienced faster growth in formal employment. The elasticities were 0.25 on impact, peaked at 0.4, and remained positive and significant even 10 years after the shock, pointing to a long and protracted labor market adjustment. In the long run, informal employment responds negatively to export shocks. Using a granular taxonomy for economic activities based on their environmental impact, the paper documents that environmentally risky activities have a larger share of employment than environmentally sustainable ones, and that the relationship between these activities and exports is nuanced. Over the short run, environmentally risky employment responds more strongly to exports relative to environmentally sustainable employment. However, over the long run, this pattern reverses, as the impact of exports on environmentally sustainable employment is more persistent.
  • Publication
    The Macroeconomic Implications of Climate Change Impacts and Adaptation Options
    (Washington, DC: World Bank, 2025-05-29) Abalo, Kodzovi; Boehlert, Brent; Bui, Thanh; Burns, Andrew; Castillo, Diego; Chewpreecha, Unnada; Haider, Alexander; Hallegatte, Stephane; Jooste, Charl; McIsaac, Florent; Ruberl, Heather; Smet, Kim; Strzepek, Ken
    Estimating the macroeconomic implications of climate change impacts and adaptation options is a topic of intense research. This paper presents a framework in the World Bank's macrostructural model to assess climate-related damages. This approach has been used in many Country Climate and Development Reports, a World Bank diagnostic that identifies priorities to ensure continued development in spite of climate change and climate policy objectives. The methodology captures a set of impact channels through which climate change affects the economy by (1) connecting a set of biophysical models to the macroeconomic model and (2) exploring a set of development and climate scenarios. The paper summarizes the results for five countries, highlighting the sources and magnitudes of their vulnerability --- with estimated gross domestic product losses in 2050 exceeding 10 percent of gross domestic product in some countries and scenarios, although only a small set of impact channels is included. The paper also presents estimates of the macroeconomic gains from sector-level adaptation interventions, considering their upfront costs and avoided climate impacts and finding significant net gross domestic product gains from adaptation opportunities identified in the Country Climate and Development Reports. Finally, the paper discusses the limits of current modeling approaches, and their complementarity with empirical approaches based on historical data series. The integrated modeling approach proposed in this paper can inform policymakers as they make proactive decisions on climate change adaptation and resilience.
  • Publication
    The Asymmetric Bank Distress Amplifier of Recessions
    (Washington, DC: World Bank, 2025-07-11) Kim, Dohan
    One defining feature of financial crises, evident in U.S. and international data, is asymmetric bank distress—concentrated losses on a subset of banks. This paper proposes a model in which shocks to borrowers’ productivity dispersion lead to asymmetric bank losses. The framework exhibits a “bank distress amplifier,” exacerbating economic downturns by causing costly bank failures and raising uncertainty about the solvency of banks, thereby pushing banks to deleverage. Quantitative analysis shows that the bank distress amplifier doubles investment decline and increases the spread by 2.5 times during the Great Recession compared to a standard financial accelerator model. The mechanism helps explain how a seemingly small shock can sometimes trigger a large crisis.
  • Publication
    Impact of Heat Waves on Learning Outcomes and the Role of Conditional Cash Transfers
    (Washington, DC: World Bank, 2025-07-14) Miranda, Juan José; Contreras, Cesar
    This paper evaluates the impact of higher temperatures on learning outcomes in Peru. The results suggest that 1 degree above 20°C is equivalent to 7 and 6 percent of a standard deviation of what a student learns in a year for math and reading tests, respectively. These results hold true when the main specification is changed, splitting the sample, collapsing the data at school level, and using other climate specifications. The paper aims to improve understanding of how to deal with the impacts of climate change on learning outcomes in developing countries. The evidence suggests that conditional cash transfer programs can mitigate the negative effects of higher temperatures on students’ learning outcomes in math and reading.
Journal
Journal Volume
Journal Issue

Related items

Showing items related by metadata.

  • Publication
    Distributions in Motion : Economic Growth, Inequality, and Poverty Dynamics
    (2010-09) Ferreira, Francisco H.G.
    The joint determination of aggregate economic growth and distributional change has been studied empirically from at least three different perspectives. A macroeconomic approach that relies on cross-country data on poverty, inequality, and growth rates has generated some interesting stylized facts about the correlations between these variables, but has not shed much light on the underlying determinants. "Meso-" and microeconomic approaches have fared somewhat better. The microeconomic approach, in particular, builds on the observation that growth, changes in poverty, and changes in inequality are simply different aggregations of information on the incidence of economic growth along the income distribution. This paper reviews the evolution of attempts to understand the nature of growth incidence curves, from the statistical decompositions associated with generalizations of the Oaxaca-Blinder method, to more recent efforts to generate "economically consistent" counterfactuals, drawing on structural, reduced-form, and computable general equilibrium models.
  • Publication
    Benchmarking the Determinants of Economic Growth in Latin America and the Caribbean
    (World Bank, Washington, DC, 2014-12) Araujo, Jorge Thompson; Brueckner, Markus; Clavijo, Mateo; Vostroknutova, Ekaterina; Wacker, Konstantin M.
    The Latin America and Caribbean (LAC) region has seen a decade of remarkable growth and income convergence. Growth has been a key driver for reducing poverty and boosting shared prosperity. It has been debated how much of this decade of growth has been driven by policy reforms and how much was due to the favorable external conditions. While external factors were supportive and relevant, the effect of domestic policies was just as relevant for explaining LAC's recent growth performance. The emphasis of domestic policy has shifted from stabilization policies to structural policies. In addition, a benchmarking exercise reveals which policy gaps will lead to the highest potential growth-payoffs for each country and helps identify potential trade-offs. The authors analyze growth in LAC using descriptive statistics and growth econometrics. The authors use these results for explaining the pattern of growth in LAC over the last decade, for looking ahead, and to identify potential policy gaps.
  • Publication
    Beyond Commodities
    (World Bank, Washington, DC, 2014-12-01) Thompson Araujo, Jorge; Brueckner, Markus; Clavijo, Mateo; Vostroknutova, Ekaterina; Wacker, Konstantin M.
    The Latin America and Caribbean (LAC) region has seen a decade of remarkable growth and income convergence. Growth has been a key driver for reducing poverty and boosting shared prosperity. It has been debated how much of this decade of growth has been driven by policy reforms and how much was due to the favorable external conditions. While external factors were supportive and relevant, the effect of domestic policies was just as relevant for explaining LAC's recent growth performance. The emphasis of domestic policy has shifted from stabilization policies to structural policies. In addition, a benchmarking exercise reveals which policy gaps will lead to the highest potential growth-payoffs for each country and helps identify potential trade-offs. The authors analyze growth in LAC using descriptive statistics and growth econometrics. The authors use these results for explaining the pattern of growth in LAC over the last decade, for looking ahead, and to identify potential policy gaps.
  • Publication
    Weak Instruments in Growth Regressions
    (World Health Organization, 2015-11) Kraay, Aart
    This paper revisits four recent cross-country empirical studies on the effects of inequality on growth. All four studies report strongly significant negative effects, using the popular system generalized method of moments estimator that is frequently used in cross-country growth empirics. This paper shows that the internal instruments relied on by this estimator in these inequality-and-growth regressions are weak, and that weak instrument-consistent confidence sets for the effect of inequality on growth include a wide range of positive and negative values. This suggests that strong conclusions about the effect of inequality on growth— in either direction—cannot be drawn from these studies. This paper also systematically explores a wide range of alternative sets of internal instruments, and finds that problems of weak instruments are pervasive across these alternatives. More generally, the paper illustrates the importance of documenting instrument strength, basing inferences on procedures that are robust to weak instruments, and considering alternative instrument sets when using the system generalized method of moments estimator for cross-country growth empirics.
  • Publication
    Asset Distribution, Inequality, and Growth
    (World Bank, Washington, DC, 2000-06) Olinto, Pedro; Deininger, Klaus
    With the recent resurgence of interest in equity, inequality, and growth, the possibility of a negative relationship between inequality and economic growth, has received renewed interest in the literature. Faced with the prospect that high levels of inequality may persist, and give rise to poverty traps, policymakers are paying more attention to the distributional implications of macroeconomic policies. Because high levels of inequality may hurt overall growth, policymakers are exploring measures to promote growth and equity at the same time. How the consequences of inequality are analyzed, along with the possible cures, depends partly on how inequality is measured. The authors use assets (land) rather than income - and a GMM estimator - to examine the robustness of the relationship between inequality and growth that has been observed in the cross-sectional literature, but has been drawn into question by recent studies using panel techniques. They find evidence that asset inequality - but not income inequality - has a relatively large negative impact on growth. They also find that a highly unequal distribution of assets reduces the effectiveness of educational interventions. This means that policymakers should be more concerned about households' access to assets, and to the opportunities associated with them, than about the distribution of income. Long-term growth might be improved by measures to prevent large jumps in asset inequality - possibly irreversible asset loss because of exogenous shocks - and by policies to facilitate asset accumulation by the poor.

Users also downloaded

Showing related downloaded files

  • Publication
    Argentina Country Climate and Development Report
    (World Bank, Washington, DC, 2022-11) World Bank Group
    The Argentina Country Climate and Development Report (CCDR) explores opportunities and identifies trade-offs for aligning Argentina’s growth and poverty reduction policies with its commitments on, and its ability to withstand, climate change. It assesses how the country can: reduce its vulnerability to climate shocks through targeted public and private investments and adequation of social protection. The report also shows how Argentina can seize the benefits of a global decarbonization path to sustain a more robust economic growth through further development of Argentina’s potential for renewable energy, energy efficiency actions, the lithium value chain, as well as climate-smart agriculture (and land use) options. Given Argentina’s context, this CCDR focuses on win-win policies and investments, which have large co-benefits or can contribute to raising the country’s growth while helping to adapt the economy, also considering how human capital actions can accompany a just transition.
  • Publication
    Business Ready 2024
    (Washington, DC: World Bank, 2024-10-03) World Bank
    Business Ready (B-READY) is a new World Bank Group corporate flagship report that evaluates the business and investment climate worldwide. It replaces and improves upon the Doing Business project. B-READY provides a comprehensive data set and description of the factors that strengthen the private sector, not only by advancing the interests of individual firms but also by elevating the interests of workers, consumers, potential new enterprises, and the natural environment. This 2024 report introduces a new analytical framework that benchmarks economies based on three pillars: Regulatory Framework, Public Services, and Operational Efficiency. The analysis centers on 10 topics essential for private sector development that correspond to various stages of the life cycle of a firm. The report also offers insights into three cross-cutting themes that are relevant for modern economies: digital adoption, environmental sustainability, and gender. B-READY draws on a robust data collection process that includes specially tailored expert questionnaires and firm-level surveys. The 2024 report, which covers 50 economies, serves as the first in a series that will expand in geographical coverage and refine its methodology over time, supporting reform advocacy, policy guidance, and further analysis and research.
  • Publication
    Services Unbound
    (Washington, DC: World Bank, 2024-12-09) World Bank
    Services are a new force for innovation, trade, and growth in East Asia and Pacific. The dramatic diffusion of digital technologies and partial policy reforms in services--from finance, communication, and transport to retail, health, and education--is transforming these economies. The result is higher productivity and changing jobs in the services sector, as well as in the manufacturing sectors that use these services. A region that has thrived through openness to trade and investment in manufacturing still maintains innovation-inhibiting barriers to entry and competition in key services sectors. 'Services Unbound: Digital Technologies and Policy Reform in East Asia and Pacific' makes the case for deeper domestic reforms and greater international cooperation to unleash a virtuous cycle of increased economic opportunity and enhanced human capacity that would power development in the region.
  • Publication
    Classroom Assessment to Support Foundational Literacy
    (Washington, DC: World Bank, 2025-03-21) Luna-Bazaldua, Diego; Levin, Victoria; Liberman, Julia; Gala, Priyal Mukesh
    This document focuses primarily on how classroom assessment activities can measure students’ literacy skills as they progress along a learning trajectory towards reading fluently and with comprehension by the end of primary school grades. The document addresses considerations regarding the design and implementation of early grade reading classroom assessment, provides examples of assessment activities from a variety of countries and contexts, and discusses the importance of incorporating classroom assessment practices into teacher training and professional development opportunities for teachers. The structure of the document is as follows. The first section presents definitions and addresses basic questions on classroom assessment. Section 2 covers the intersection between assessment and early grade reading by discussing how learning assessment can measure early grade reading skills following the reading learning trajectory. Section 3 compares some of the most common early grade literacy assessment tools with respect to the early grade reading skills and developmental phases. Section 4 of the document addresses teacher training considerations in developing, scoring, and using early grade reading assessment. Additional issues in assessing reading skills in the classroom and using assessment results to improve teaching and learning are reviewed in section 5. Throughout the document, country cases are presented to demonstrate how assessment activities can be implemented in the classroom in different contexts.
  • Publication
    Women, Business and the Law 2024
    (Washington, DC: World Bank, 2024-03-04) World Bank
    Women, Business and the Law 2024 is the 10th in a series of annual studies measuring the enabling conditions that affect women’s economic opportunity in 190 economies. To present a more complete picture of the global environment that enables women’s socioeconomic participation, this year Women, Business and the Law introduces two new indicators—Safety and Childcare—and presents findings on the implementation gap between laws (de jure) and how they function in practice (de facto). This study presents three indexes: (1) legal frameworks, (2) supportive frameworks (policies, institutions, services, data, budget, and access to justice), and (3) expert opinions on women’s rights in practice in the areas measured. The study’s 10 indicators—Safety, Mobility, Workplace, Pay, Marriage, Parenthood, Childcare, Entrepreneurship, Assets, and Pension—are structured around the different stages of a woman’s working life. Findings from this new research can inform policy discussions to ensure women’s full and equal participation in the economy. The indicators build evidence of the critical relationship between legal gender equality and women’s employment and entrepreneurship. Data in Women, Business and the Law 2024 are current as of October 1, 2023.