Financial bubbles and income inequality

Brett, Craig and Sarkar, Saikat (2022): Financial bubbles and income inequality.

Abstract

Using a sample of OECD countries, we explore the relationships between stock market bubbles and income inequality. Specifically, we test whether explosive growth in stock prices leads to increased concentration of income at the top of the distribution. Moreover, we investigate the possibility that increased income concentration at the top increases the incidence or severity of asset bubbles. Using instrumental variables techniques, we uncover a positive effect of asset bubbles on the share of income earned by those in the top 1% and top 0.1% of the income distribution. However, this effect is not present when capital gains are excluded from income, supporting the idea that the mechanical effect of bubbles on asset income is a dominant driver of their effect on top income inequality. On the other hand, we also find that concentration of income at the top is associated with an increase in bubbles, whether measured by incidence, duration, or intensity. Moreover, this finding remains when capital gains are excluded from income. Our results suggest that top income inequality, whatever its source, increases the demand for assets, setting the stage for abnormal growth in stock prices.

• Item Type: MPRA Paper
• Language: English
• Keywords: bubbles and crashes; top income shares
• Subjects: D - Microeconomics > D3 - Distribution > D31 - Personal Income, Wealth, and Their Distributions; G - Financial Economics > G1 - General Financial Markets > G19 - Other

References

Aghion, P., Akcigit, U., Bergeaud, A., Blundell, R., Hemous, D., 2019. Innovation and Top Income Inequality. Review of Economic Studies 86, 1--45.

Banerjee, A.~V., Duflo, E., September 2003. Inequality and Growth: What Can the Data Say? Journal of Economic Growth 8, 267--299.

Barro, R.~J., Ursua, J.~F., 2017. Stock-market crashes and depressions. Research in Economics 71, 384--398.

Bergh, A., Nilsson, T., December 2010. Do liberalization and globalization increase income inequality? European Journal of Political Economy 26, 488--505.

Bernanke, B.S., Gertler, M., May 2001. Should Central Banks Respond to Movements in Asset Prices? American Economic Review 91, 253--257.

Blanchard, O.J., Romer, D., Spence, M., Stiglitz, J.E. (Eds.), December 2012. In the Wake of the Crisis: Leading Economists Reassess Economic Policy. Vol. 1 of MIT Press Books. The MIT Press.

Brunnermeier, M., Rother, S., Schnabel, I., Goldstein, I., 2020. Asset Price Bubbles and Systemic Risk. Review of Financial Studies 33, 4272--4317.

Brunnermeier, M.~K., Schnabel, I., 2016. Bubbles and central banks: Historical perspectives. In: Bordo, M., Eitrheim, O., Flandreau, M., Qvigstad, J.F. (Eds.), Central Banks at a Crossroads. Cambridge University Press, Cambridge, pp. 493--562.

European Central Bank, 2010. Asset price bubbles and monetary policy revisited. Monthly Bulletin: November, 71--83.

Fielding, D., Torres, S., December 2006. A simultaneous equation model of economic development and income inequality. The Journal of Economic Inequality 4, 279--301.

Forbes, K.~J., September 2000. A Reassessment of the Relationship between Inequality and Growth. American Economic Review 90, 869--887.

Gozgor, G., Ranjan, P., December 2017. Globalisation, inequality and redistribution: Theory and evidence. The World Economy 40, 2704--2751.

Gu, X., Haung, B., 2014. Deos inequality lead to a financial crisis? revisited. Review of Development Economics 18, 502--516.

Guellec, D., Paunov, C., 2017. Digital innovation and the distribution of income. Working Paper 23987, NBER.

Jarrow, R., Protter, P., September 2020. Credit Risk, Liquidity, and Bubbles. International Review of Finance 20~(3), 737--746.

Jaumotte, F., Lall, S., Papageorgiou, C., June 2013. Rising Income Inequality: Technology, or Trade and Financial Globalization?. IMF Economic Review 61~(2), 271--309.

Kirschenmann, K., Malinen, T., Nyberg, H., 2016. The risk of financial crises: Is there a role for income inequality? Journal of International Money and Finance 68, 161--180.

Kumhof, M., Rancière, R., P.Winant, 2015. Inequality, leverage, and crises. American Economic Review 105, 1217--1245.

Lundberg, M., Squire, L., April 2003. The simultaneous evolution of growth and inequality. Economic Journal 113~(487), 326--344.

Markiewicz, A., Raciborski, R., January 2022. Income Inequality and Stock Market Returns. Review of Economic Dynamics 43, 286--307.

Morelli, S., Atkinson, A., 2015. Inequality and crises revisited. Economia Politica: Journal of Analytical and Institutional Economics 32, 31--51.

Narayan, P.K., Mishra, S., Sharma, S., Liu, R., 2013. Determinants of stock price bubbles. Economic Modelling 35, 661--667.

Phillips, P. C.~B., Shi, S., Yu, J., November 2015. Testing For Multiple Bubbles: Historical Episodes Of Exuberance And Collapse In The S&P 500. International Economic Review 56, 1043--1078.

Piketty, T., Saez, E., Winter 2007. How Progressive is the U.S. Federal Tax System? A Historical and International Perspective. Journal of Economic Perspectives 21, 3--24.

Piketty, T., Saez, E., Stantcheva, S., February 2014. Optimal Taxation of Top Labor Incomes: A Tale of Three Elasticities. American Economic Journal: Economic Policy 6, 230--271.

Ranjan, R., 2010. Fault Lines: How Hidden Fractures Still Threaten the World Economy. Princeton University Press, Princeton, NJ.

Reinhart, C.~M., Rogoff, K.~S., August 2011. From Financial Crash to Debt Crisis. American Economic Review 101, 1676--1706.

Sarkar, S., Tuomala, M., December 2021. Asset bubbles in explaining top income shares. The Journal of Economic Inequality 19, 707--726.

Schumpeter, J.A., 1950. Capitalism, Socialism and Democracy. Harper and Row, New York.

Shiller, R.J., June 1981. Do Stock Prices Move Too Much to be Justified by Subsequent Changes in Dividends? American Economic Review 71~(3), 421--436.

Sukiassyan, G., March 2007. Inequality and growth: What does the transition economy data say? Journal of Comparative Economics 35~(1), 35--56.

Topol, R., July 1991. Bubbles and Volatility of Stock Prices: Effect of Mimetic Contagion. Economic Journal 101, 786--800.

Tridico, P., 2018. The determinants of income inequality in OECD countries [Political partisanship and welfare state reform in advanced industrial societies]. Cambridge Journal of Economics 42~(4), 1009--1042.

Zhao, Q., Li, G., Gu, X., Lei, C.K., 2021. Inequality hikes, saving surges, and housing bubbles. International Review of Economics & Finance 72, 349--363.