Growth theories traditionally focus on the Kaldor-Kuznets stylised facts. Ravi Kanbur and Nobelist Joe Stiglitz argue that these no longer hold; new theory is needed. The new models need to drop competitive marginal productivity theories of factor returns in favour of rent-generating mechanism and wealth inequality by focusing on the ‘rules of the game.’ They also must model interactions among physical, financial, and human capital that influence the level and evolution of inequality. A third key component will be to capture mechanisms that transmit inequality from generation to generation.
Ravi Kanbur, Joseph Stiglitz, Tuesday, August 18, 2015
Philippe Aghion, Ufuk Akcigit, Antonin Bergeaud, Richard Blundell, David Hemous, Tuesday, July 28, 2015
In recent decades, there has been an accelerated increase in top income inequality, particularly in developed countries. This column argues that innovation partly accounts for the surge in top income inequality and fosters social mobility. In particular, the positive effect of innovation on social mobility is due to new innovators.
Bernardin Akitoby, Sanjeev Gupta, Abdelhak Senhadji, Saturday, July 18, 2015
There has been a heated debate about the effectiveness of fiscal policy as a countercyclical tool but little evidence on how it can support growth. This column shows that fiscal policy can lift medium- and long-term growth in both advanced and developing economies. But all fiscal reforms are not equal in their growth dividend. Successful reforms are often part of a broader reform package and can balance the growth-equity trade-off.
Matthew E. Kahn, Cong Sun, Siqi Zheng, Wednesday, July 8, 2015
China’s cities suffer from extremely high levels of air pollution, and Chinese consumers spend more than $US100 million on anti-smog products per year. Using recent internet sales data, this column explores how investing in such self-protection products varies for consumers with different income brackets. The urban poor are shown to be less likely to engage in this health-improving strategy. This suggests that cross-sectional income comparisons understate lifetime inequality.
Markus Brückner, Daniel Lederman, Tuesday, July 7, 2015
The relationship between aggregate output and income inequality is central in macroeconomics. This column argues that greater income inequality raises the economic growth of poor countries and decreases the growth of high- and middle-income countries. Human capital accumulation is an important channel through which income inequality affects growth.
Chie Aoyagi, Giovanni Ganelli, Kentaro Murayama, Wednesday, June 3, 2015
Income inequality in Japan has been growing over the past few decades. This column discusses the macroeconomic significance of inclusive growth and its role in the ultimate success of Abenomics. The findings suggest that full implementation of structural reforms – including launching the third arrow of Abenomics – would be necessary to foster growth and increase equality.
Melissa S. Kearney, Phillip B. Levine, Thursday, May 28, 2015
Compared to other developed countries, the US ranks high on income inequality and low on social mobility. This could be particularly concerning if such a trend is self-perpetuating. In this column, the authors argue that there is a causal relationship between income inequality and high school dropout rates among disadvantaged youth. In particular, moving from a low-inequality to a high-inequality state increases the likelihood that a male student from a low socioeconomic status drops out of high school by 4.1 percentage points. The lack of opportunity for disadvantaged students, therefore, may be self-perpetuating.
Jason Furman, Friday, February 20, 2015
The US economy has strengthened considerably in recent years, presenting an opportunity to address the 40-year stagnation in incomes for the middle class. This column provides historical and international context for the key factors affecting middle-class incomes: productivity growth, labour force participation, and income inequality. It also outlines President Obama’s approach to economic policies – what he terms “middle-class economics” – which is designed to improve all three.
Kirill Shakhnov, Saturday, January 17, 2015
The rapid growth of the US financial sector has driven policy debate on whether it is socially desirable. This column examines the trade-off between finance and entrepreneurship, and links the growth of finance to rising wealth inequality. Although financial intermediation helps allocate capital efficiently, people choosing a career in finance do not internalise the negative effect on the pool of talented entrepreneurs. This mechanism can explain the simultaneous growth of wealth inequality and finance in the US, and why more unequal countries have larger financial sectors.
Loukas Karabarbounis, Brent Neiman, Tuesday, November 25, 2014
The share of compensation to labour in gross value added has declined in recent decades for most countries and industries around the world. Recent work has also used the share of compensation to labour in net value added as a proxy for inequality. This column discusses that gross and net labour shares have declined together for most countries since 1975 – an outcome consistent with the worldwide decline in the relative price of investment goods.
Olivier Coibion, Yuriy Gorodnichenko, Lorenz Kueng, John Silvia, Saturday, October 25, 2014
There are several conflicting channels through which monetary policy could affect the distribution of wealth, income, and consumption. This column argues that contractionary monetary policy raised inequality in the US, while expansionary monetary policy lowered it. This evidence stresses the need for monetary policy models that take into account heterogeneity across households. Current monetary policy models may significantly understate the welfare costs of zero-bound episodes.
Judith Niehues, Sunday, September 28, 2014
Income inequality is high in the US, but the support of social welfare programmes is low. In Europe, income inequality is low and the welfare states are generous. This column argues that this paradox is largely due to perceived inequality. Many Europeans believe that there is high inequality in their countries, justifying the need for redistributive policies. Americans, however, are less concerned with income differences and with respective redistributive state intervention.
Reto Foellmi, Isabel Martínez, Sunday, August 31, 2014
Switzerland has had consistently low tax rates and a remarkably stable income distribution, although in the last 20 years the share of top incomes has risen. This column documents that the top 0.01%’s share doubled, meaning Switzerland is similar to European countries in terms of the top 1%’s income share, but closer to the US for higher top incomes. Labour incomes have grown in importance among top income earners. At the same time, however, top incomes have exhibited large and possibly increasing variations over the business cycle.
Coen Teulings, Sunday, June 15, 2014
Income inequality has increased worldwide in recent years. This column discusses the role of technological progress, globalisation, and the liberalisation of labour-market institutions in this growing inequality. The liberalisation of labour market institutions has made labour markets more flexible and created many jobs. But beyond a certain point, the net effect of further liberalisation might be negative for society.
Christoph Lakner , Branko Milanovic, Tuesday, May 27, 2014
Since 1988, rapid growth in Asia has lifted billions out of poverty. Incomes at the very top of the world income distribution have also grown rapidly, whereas median incomes in rich countries have grown much more slowly. This column asks whether these developments, while reducing global income inequality overall, might undermine democracy in rich countries.
Benedict Clements, David Coady, Ruud de Mooij, Sanjeev Gupta, Tuesday, April 15, 2014
The causes and consequences of rising inequality have stirred a lively debate on appropriate policy responses. This column reviews how governments have successfully used fiscal policy to address distributive concerns. It also examines the policy alternatives that countries can pursue in order to reduce income and wealth inequality at a minimum cost to efficiency. Such policies include exploitation of property taxes, reductions in tax deductions that favour upper-income groups, investing in increasing the human capital of low-income groups, and reforming social benefits.
Davide Furceri, Prakash Loungani, Thursday, February 13, 2014
Income inequality has been growing in many economies over the past two decades, and it is currently historically high. This column adds two new contributors to the popular explanations of increased inequality. Fiscal consolidations, especially those following the recent crisis, can increase inequality, mostly by affecting the long-term unemployment. A second source that leads to a persistent increase in inequality is capital account liberalisation. Therefore, the effects of these policies on inequality should be taken into account when deciding upon policy designs.
Thomas Piketty, Gabriel Zucman, Thursday, September 26, 2013
According to many measures, inequality has been increasing in the developed world and is now approaching prewar levels. Income inequality does not tell the whole story. This column documents the increase in the ratio of private wealth to national income. This macroeconomic change, precipitated by slowing GDP growth, exacerbates the problem of wealth inequality and makes the economy more susceptible to bubbles.
Augusto de la Torre, Julián Messina, Thursday, March 7, 2013
The last decade has seen unprecedented economic and social achievements in Latin America. This column investigates the relationship between changes in the labour market and the drop in income inequality across the continent. There is certainly room for more research to help us better understand Latin America’s spectacular decline in income inequality, but what is clear is that the good news is tempered by the fact that the specialisation of the region’s economies are relatively low in skill intensity and therefore productivity.
Joshua Aizenman, Yothin Jinjarak, Saturday, June 30, 2012
Might income inequality make structural adjustments more difficult? This column presents data from 50 countries in 2007, in 2009, and in 2011, and finds that higher income inequality in the country is associated with a lower tax base, less fiscal space, and higher sovereign spreads.