Skip to main content

Advertisement

Log in

We forgot the middle class! Inequality underestimation in a changing Sub-Saharan Africa

  • Published:
The Journal of Economic Inequality Aims and scope Submit manuscript

Abstract

The creation of national middle classes and the changes in consumption patterns in many Sub-Saharan African (SSA) countries suggest reconsidering the way welfare and consequently inequality is typically measured. Using only consumption to measure welfare can lead to an important loss of information regarding the real welfare of the top 10–20% of the welfare distribution that is generally referred as “middle class” in these countries. This paper proposes a method capable of correcting the middle-class part of the consumption distribution using information coming from the income distribution of the same surveys. Results from 6 SSA countries indicate an increase of about 20% in the Gini index.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • African Development Bank: The Middle of the Pyramid: Dynamics of the Middle Class in Africa. Market brief, African Development Bank, Abidjan (Ivory Coast) (2011) Available at: https://www.afdb.org/fileadmin/uploads/afdb/Documents/Publications/The%20Middle%20of%20the%20Pyramid_The%20Middle%20of%20the%20Pyramid.pdf

    Google Scholar 

  • Akaike, H.: Information theory and an extension of the likelihood ratio principle. In: Petrov, B.N., Csaki, F. (eds.) Proceedings of the Second International Symposium of Information Theory, pp. 257–281. Akademiai Kiado, Budapest (1973)

    Google Scholar 

  • Alvaredo, F.: The rich in Argentina over the twentieth century: 1932-2004. In: Atkinson, A.B., Piketty, T. (eds.) Top Incomes: A Global Perspective, pp. 253–298. Oxford University Press, Oxford (2010)

  • An, D., Little, R.J.A.: Multiple imputation: an alternative to top coding for statistical disclosure control. J. R. Stat. Soc. A. Stat. Soc.170, 923–940 (2007)

    Google Scholar 

  • Araar, A., Duclos, J.-Y.: DASP: Distributive Analysis Stata Package. PEP, World Bank, UNDP and Université Laval (2007)

  • Atkinson, A.B., Piketty, T., Saez, E.: Top incomes in the long run of history. J. Econ. Lit. 49, 3–71 (2011)

    Google Scholar 

  • Beegle, K., Christiaensen, L., Dabalen, A., Gaddis, I.: Poverty in a Rising Africa. World Bank, Washington, DC. Available at: https://openknowledge.worldbank.org/handle/10986/22575 (2016)

    Google Scholar 

  • Bertoni, E., Clementi, F., Molini, V., Schettino, F., Teraoka, H.: Poverty Work Program: Poverty Reduction in Nigeria in the Last Decade. World Bank, Washington, DC. Available at: http://documents.worldbank.org/curated/en/103491483646246005/Poverty-work-program-poverty-reduction-in-Nigeria-in-the-last-decade (2016)

    Google Scholar 

  • Betti, G., D’Agostino, A., Lemmi, A.: Fuzzy monetary poverty measures under a Dagum income distributive hypothesis. In: Chotikapanich, D. (ed.) Modeling Income Distributions and Lorenz Curves, pp. 225–240. Springer, New York (2008)

    Google Scholar 

  • Carletto, G., Covarrubias, K., Davis, B., Krausova, M., Winters, P. Rural Income Generating Activities Study: Methodological Note on the Construction of Income Aggregates. Prepared for the Rural Income Generating Activities (RIGA) project of the Agricultural Development Economics Division, Food and Agriculture Organization, 2007. Available at: http://www.fao.org/fileadmin/user_upload/riga/pdf/ai197e00.pdf

  • Clementi, F.: Heavy-tailed distributions for agent-based economic modelling. In: Caiani, A., Russo, A., Palestrini, A., Gallegati, M. (eds.) Economics with Heterogeneous Interacting Agents: A Practical Guide to Agent-Based Modeling, pp. 157–190. Springer International Publishing AG, Cham (2016)

    Google Scholar 

  • Corral Rodas, P.A., Molini, V., Siwatu, G.O.: No condition is permanent: middle class in Nigeria in the last decade. J. Dev. Stud. 55, 294–310 (2019)

    Google Scholar 

  • Cox, D.R., Snell, E.J.: A general definition of residuals. J. R. Stat. Soc. Ser. B Methodol.30, 248–275 (1968)

    Google Scholar 

  • Cruces, G., Lanjouw, P., Lucchetti, L., Perova, E., Vakis, R., Viollaz, M.: Estimating poverty transitions using repeated cross-sections: a three-country validation exercise. J. Econ. Inequal. 13, 161–179 (2015)

    Google Scholar 

  • Dagum, C.: A new model of personal income distribution: specification and estimation. Econ. Appl. 30, 413–436 (1977)

    Google Scholar 

  • Deaton, A., Zaidi, S. Guidelines for Constructing Consumption Aggregates for Welfare Analysis. LSMS Working Paper 135, World Bank, Washington DC, 2002. Available at: https://openknowledge.worldbank.org/handle/10986/14101

  • Dynan, K.E., Skinner, J.S., Zeldes, S.P.: Do the rich save more? J. Polit. Econ. 112, 397–444 (2004)

    Google Scholar 

  • Elandt-Johnson, R.C., Johnson, N.L.: Survival Models and Data Analysis, 3rd edn. John Wiley & Sons, Inc., Hoboken (2003)

    Google Scholar 

  • Ferreira, F.H.G., Messina, H., Rigolini, J., López-Calva, L.F., Lugo, M.A., Vakis, R.: Economic Mobility and the Rise of the Latin American Middle Class. World Bank, Washington, DC (2013) Available at: https://openknowledge.worldbank.org/handle/10986/11858

    Google Scholar 

  • Friedman, M.: A Theory of the Consumption Function. Princeton University Press, Princeton (1957)

    Google Scholar 

  • Gandelman, N.: Do the rich save more in Latin America? J. Econ. Inequal. 15, 75–92 (2017)

    Google Scholar 

  • Geithman, D.T.: Middle class growth and economic development in Latin America. Am. J. Econ. Sociol. 33, 45–58 (1974)

    Google Scholar 

  • Goldthorpe, J.H.: Social Mobility and Class Structure in Modern Britain. Clarendon Press, Oxford (1987)

    Google Scholar 

  • Gollin, D., Lagakos, D., Waugh, M.E.: The agricultural productivity gap. Q. J. Econ. 129, 939–993 (2014)

    Google Scholar 

  • Golub, S.S., Hayat, F.: Employment, Unemployment and Underemployment in Africa. Working Paper 2014/014, UNU-WIDER, Helsinki. Available at: https://www.wider.unu.edu/publication/employment-unemployment-and-underemployment-africa (2014).

  • Hlasny, V., Verme, P.: Top incomes and the measurement of inequality in Egypt. World Bank Econ. Rev. 32, 428–455 (2016)

    Google Scholar 

  • Honorati, M., Johansson de Silva, S.: Expanding Job Opportunities in Ghana. World Bank, Washington, DC (2016)

    Google Scholar 

  • ILO.:Resolution 1: Resolution Concerning Household Income and Expenditure Statistics. Adopted at the 17th International Conference of Labor Statisticians, December, Geneva. Available at: http://www.ilo.org/global/statistics-and-databases/standards-and-guidelines/resolutions-adopted-by-international-conferences-of-labour-statisticians/WCMS_087503/lang%2D%2Den/index.htm (2003).

  • International Monetary Fund: Sub-Saharan Africa: Maintaining Growth in an Uncertain World. Regional economic outlook, International Monetary Fund, Washington DC. Available at: https://www.imf.org/external/pubs/ft/reo/2012/afr/eng/sreo1012.htm (2012)

    Google Scholar 

  • Jappelli, T., Pistaferri, L.: Fiscal policy and MPC heterogeneity. Am. Econ. J. Macroecon. 6, 107–136 (2014)

    Google Scholar 

  • Jenkins, S.P.: Fitting Singh-Maddala and Dagum distributions by maximum likelihood. Stata Tech. Bull. 48, 19–25 (1999)

    Google Scholar 

  • Jenkins, S.P.: GB2FIT: Stata module to FIT generalized beta of the second kind distribution by maximum likelihood. Statistical Software Components Archive S456823. http://ideas.repec.org/c/boc/bocode/s456823.html (2007).

  • Jenkins, S.P.: Distributionally-sensitive inequality indices and the GB2 income distribution. Rev. Income Wealth. 55, 392–398 (2009)

    Google Scholar 

  • Jenkins, S.P.: GB2LFIT: Stata module to fit generalized beta of the second kind distribution by maximum likelihood (log parameter metric). Statistical Software Components Archive S457897. https://ideas.repec.org/c/boc/bocode/s457897.html (2014).

  • Jenkins, S.P., Burkhauser, R.V., Feng, S., Larrimore, J.: Measuring inequality using censored data: a multiple-imputation approach to estimation and inference. J. R. Stat. Soc. A. Stat. Soc.174, 63–81 (2011)

  • Kleiber, C.: Dagum vs. Singh-Maddala income distributions. Econ. Lett. 53, 265–268 (1996)

    Google Scholar 

  • Kleiber, C.: A guide to the Dagum distributions. In: Chotikapanich, D. (ed.) Modeling Income Distributions and Lorenz Curves, pp. 97–117. Springer, New York (2008)

    Google Scholar 

  • Kleiber, C., Kotz, S.: Statistical Size Distributions in Economics and Actuarial Sciences. John Wiley & Sons, New York (2003)

    Google Scholar 

  • Kuznets, S.S.: Economic Growth of Nations: Total Output and Production Structure. Harvard University Press, Cambridge MA (1971)

  • Leigh, A., Van der Eng, P.: Inequality in Indonesia: what can we learn from top incomes? J. Public Econ. 93, 209–212 (2009)

    Google Scholar 

  • Lewis, W.A.: The Theory of Economic Growth. Allen & Unwin, London (1955)

    Google Scholar 

  • López-Calva, L.F., Ortiz-Juarez, E.: A vulnerability approach to the definition of the middle class. J. Econ. Inequal. 12, 23–47 (2014)

    Google Scholar 

  • McCarthy, J.: Imperfect insurance and differing propensities to consume across households. J. Monet. Econ. 36, 301–327 (1995)

    Google Scholar 

  • McDonald, J.B.: Some generalized functions for the size distribution of income. Econometrica. 52, 647–665 (1984)

    Google Scholar 

  • McDonald, J.B., Ransom, M.R.: The generalized beta distribution as a model for the distribution of income: estimation of related measures of inequality. In: Chotikapanich, D. (ed.) Modeling Income Distributions and Lorenz Curves, pp. 147–166. Springer, New York (2008)

    Google Scholar 

  • McDonald, J.B., Xu, Y.J.: A generalization of the beta distribution with applications. J. Econ. 66, 133–152 (1995a)

    Google Scholar 

  • McDonald, J.B., Xu, Y.J.: Errata. J. Econ. 69, 427–428 (1995b)

    Google Scholar 

  • McKinsey.: Lions on the Move II: Realizing the Potential of Africa’s Economies. Report, McKinsey Global Institute, New York. Available at: http://www.mckinsey.com/global-themes/middle-east-and-africa/lions-on-the-move-realizing-the-potential-of-africas-economies (2016).

  • Meyer, B.D., Sullivan, J.X.: The effects of welfare and tax reform: the material well-being of single mothers in the 1980s and 1990s. J. Public Econ. 88, 1387–1420 (2004)

    Google Scholar 

  • Milanovic, B.: The Haves and the Have-Nots: A Brief and Idiosyncratic History of Global Inequality. Basic Books, New York (2010)

    Google Scholar 

  • Milanovic, B., Yitzhaki, S.: Decomposing world income distribution: does the world have a middle class? Rev. Income Wealth. 48, 155–178 (2002)

    Google Scholar 

  • Molini, V., Paci, P.: Poverty Reduction in Ghana: Progress and Challenges. World Bank, Washington, DC (2015) Available at: https://openknowledge.worldbank.org/handle/10986/22732

    Google Scholar 

  • Pinkovskiy, M., Sala-i-Martin, X.: Africa is on time. J. Econ. Growth. 19, 311–338 (2014)

    Google Scholar 

  • Quiñones, E.J., de la O-Campos, A.P., Rodríguez-Alas, C., Hertz, T., Winters, P. Methodology for Creating the RIGA-L Database. Prepared for the Rural Income Generating Activities (RIGA) project of the Agricultural Development Economics Division, Food and Agriculture Organization. Available at: http://www.fao.org/fileadmin/templates/riga/docs/Country_survey_information/RIGA-L_Methodology.pdf (2009).

  • Quintano, C., D’Agostino, A.: Studying inequality in income distribution of single-person households in four developed countries. Rev. Income Wealth. 52, 525–546 (2006)

    Google Scholar 

  • Reiter, J.P.: Inference for partially synthetic, public use microdata sets. Surv. Methodol. 29, 181–188 (2003)

    Google Scholar 

  • Sanhueza, C., Mayer, R.: Top incomes in Chile using 50 years of household surveys: 1957-2007. Estud. Econ. 38, 169–193 (2011)

    Google Scholar 

  • Schluter, C., Trede, M.: Tails of Lorenz curves. J. Econ. 109, 151–166 (2002)

    Google Scholar 

  • Schwarz, G.E.: Estimating the dimension of a model. Ann. Stat. 6, 461–464 (1978)

    Google Scholar 

  • Singh, S.K., Maddala, G.S.: A function for size distribution of incomes. Econometrica. 44, 963–970 (1976)

    Google Scholar 

  • Tarozzi, A.: Calculating comparable statistics from incomparable surveys, with an application to poverty in India. J. Bus. Econ. Stat. 25, 314–336 (2007)

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to F. Clementi.

Additional information

Publisher’s note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Clementi, F., Dabalen, A.L., Molini, V. et al. We forgot the middle class! Inequality underestimation in a changing Sub-Saharan Africa. J Econ Inequal 18, 45–70 (2020). https://doi.org/10.1007/s10888-019-09432-8

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10888-019-09432-8

Keywords

JEL Classification

Navigation