IDEAS home Printed from https://ideas.repec.org/a/eee/ecmode/v97y2021icp255-271.html
   My bibliography  Save this article

Union wage premia and wage inequality in South Africa

Author

Listed:
  • Kerr, Andrew
  • Wittenberg, Martin

Abstract

Rising inequality in the developed world over the last 40 years has been accompanied by declining trade union power. Unions have been found to raise the wages of their members but also to reduce overall wage inequality through the standardisation of wages in the union sector. In this paper we examine the extent to which unions raise wages and affect the extremely high levels of wage inequality in South Africa, using comparable household surveys from 1993 to 2019. We find that union wage premia are extremely high, and that union membership has become increasingly concentrated at the top of the wage distribution and in the public sector. As a result, variance decompositions show that unions increased inequality slightly in more recent periods. We also find that earnings imputation from 2010 onwards makes estimating the true impact of unionisation on wages impossible without unimputed earnings data.

Suggested Citation

  • Kerr, Andrew & Wittenberg, Martin, 2021. "Union wage premia and wage inequality in South Africa," Economic Modelling, Elsevier, vol. 97(C), pages 255-271.
    • Handle: RePEc:eee:ecmode:v:97:y:2021:i:c:p:255-271
    DOI: 10.1016/j.econmod.2020.12.005
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0264999320312700
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.econmod.2020.12.005?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. T. Paul Schultz & Germano Mwabu, 1998. "Labor Unions and the Distribution of Wages and Employment in South Africa," ILR Review, Cornell University, ILR School, vol. 51(4), pages 680-703, July.
    2. Dinkelman, Taryn & Ranchhod, Vimal, 2012. "Evidence on the impact of minimum wage laws in an informal sector: Domestic workers in South Africa," Journal of Development Economics, Elsevier, vol. 99(1), pages 27-45.
    3. DiNardo, John & Fortin, Nicole M & Lemieux, Thomas, 1996. "Labor Market Institutions and the Distribution of Wages, 1973-1992: A Semiparametric Approach," Econometrica, Econometric Society, vol. 64(5), pages 1001-1044, September.
    4. David Card & Thomas Lemieux & W. Craig Riddell, 2020. "Unions and wage inequality: The roles of gender, skill and public sector employment," Canadian Journal of Economics/Revue canadienne d'économique, John Wiley & Sons, vol. 53(1), pages 140-173, February.
    5. Barry T. Hirsch, 2004. "Reconsidering Union Wage Effects: Surveying New Evidence on an Old Topic," Journal of Labor Research, Transaction Publishers, vol. 25(2), pages 233-266, April.
    6. Freeman, Richard B., 2010. "Labor Regulations, Unions, and Social Protection in Developing Countries," Handbook of Development Economics, in: Dani Rodrik & Mark Rosenzweig (ed.), Handbook of Development Economics, edition 1, volume 5, chapter 0, pages 4657-4702, Elsevier.
    7. David Card & Thomas Lemieux & W. Craig Riddell, 2004. "Unions and Wage Inequality," Journal of Labor Research, Transaction Publishers, vol. 25(4), pages 519-562, October.
    8. Freeman, Richard B, 1984. "Longitudinal Analyses of the Effects of Trade Unions," Journal of Labor Economics, University of Chicago Press, vol. 2(1), pages 1-26, January.
    9. Feinstein,Charles H., 2005. "An Economic History of South Africa," Cambridge Books, Cambridge University Press, number 9780521616416, November.
    10. Fortin, Nicole & Lemieux, Thomas & Firpo, Sergio, 2011. "Decomposition Methods in Economics," Handbook of Labor Economics, in: O. Ashenfelter & D. Card (ed.), Handbook of Labor Economics, edition 1, volume 4, chapter 1, pages 1-102, Elsevier.
    11. Richard B. Freeman, 1980. "Unionism and the Dispersion of Wages," ILR Review, Cornell University, ILR School, vol. 34(1), pages 3-23, October.
    12. Thomas Lemieux, 1993. "Unions and Wage Inequality in Canada and the United States," NBER Chapters, in: Small Differences That Matter: Labor Markets and Income Maintenance in Canada and the United States, pages 69-108, National Bureau of Economic Research, Inc.
    13. Card, David & Freeman, Richard B. (ed.), 1993. "Small Differences That Matter," National Bureau of Economic Research Books, University of Chicago Press, number 9780226092836, Febrero.
    14. Kristin F. Butcher & Cecilia Elena Rouse, 2001. "Wage Effects of Unions and Industrial Councils in South Africa," ILR Review, Cornell University, ILR School, vol. 54(2), pages 349-374, January.
    15. David G. Blanchflower & Alex Bryson, 2004. "What Effect Do Unions Have on Wages Now and Would Freeman and Medoff Be Surprised?," Journal of Labor Research, Transaction Publishers, vol. 25(3), pages 383-414, July.
    16. Jeremy R. Magruder, 2012. "High Unemployment Yet Few Small Firms: The Role of Centralized Bargaining in South Africa," American Economic Journal: Applied Economics, American Economic Association, vol. 4(3), pages 138-166, July.
    17. repec:eee:labchp:v:2:y:1986:i:c:p:1139-1181 is not listed on IDEAS
    18. Andrew Kerr & Francis Teal, 2015. "The Determinants of Earnings Inequalities: Panel Data Evidence from KwaZulu-Natal, South Africa," Journal of African Economies, Centre for the Study of African Economies, vol. 24(4), pages 530-558.
    19. Acemoglu, Daron & Autor, David, 2011. "Skills, Tasks and Technologies: Implications for Employment and Earnings," Handbook of Labor Economics, in: O. Ashenfelter & D. Card (ed.), Handbook of Labor Economics, edition 1, volume 4, chapter 12, pages 1043-1171, Elsevier.
    20. Thomas Lemieux, 2008. "The changing nature of wage inequality," Journal of Population Economics, Springer;European Society for Population Economics, vol. 21(1), pages 21-48, January.
    21. Moll, Peter, 1996. "Compulsory Centralization of Collective Bargaining in South Africa," American Economic Review, American Economic Association, vol. 86(2), pages 326-329, May.
    22. Johane Dikgang & Nomsa P. Nkosi, 2016. "Are South African consumers arm-chair environmentalists? Implications for renewable energy," Working Papers 94, Economic Research Southern Africa.
    23. Feinstein,Charles H., 2005. "An Economic History of South Africa," Cambridge Books, Cambridge University Press, number 9780521850919, November.
    24. Daniela Casale & Dorrit Posel, 2011. "Unions and the Gender Wage Gap in South Africa," Journal of African Economies, Centre for the Study of African Economies, vol. 20(1), pages 27-59, January.
    25. David Card & Richard B. Freeman, 1993. "Small Differences That Matter: Labor Markets and Income Maintenance in Canada and the United States," NBER Books, National Bureau of Economic Research, Inc, number card93-1, June.
    26. Martin Wittenberg, 2017. "Wages and Wage Inequality in South Africa 1994–2011: Part 1 – Wage Measurement and Trends," South African Journal of Economics, Economic Society of South Africa, vol. 85(2), pages 279-297, June.
    27. Barry T. Hirsch & Edward J. Schumacher, 2004. "Match Bias in Wage Gap Estimates Due to Earnings Imputation," Journal of Labor Economics, University of Chicago Press, vol. 22(3), pages 689-722, July.
    28. Miracle Ntuli & Prudence Kwenda, 2014. "Labour unions and wage inequality among African men in South Africa," Development Southern Africa, Taylor & Francis Journals, vol. 31(2), pages 322-346, March.
    29. Wittenberg, Martin., 2014. "Analysis of employment, real wage, and productivity trends in South Africa since 1994," ILO Working Papers 994847703402676, International Labour Organization.
    30. Card, David, 1996. "The Effect of Unions on the Structure of Wages: A Longitudinal Analysis," Econometrica, Econometric Society, vol. 64(4), pages 957-979, July.
    31. Haroon Bhorat & Sumayya Goga & Carlene Van Der Westhuizen, 2012. "Institutional Wage Effects: Revisiting Union And Bargaining Council Wage Premia In South Africa," South African Journal of Economics, Economic Society of South Africa, vol. 80(3), pages 400-414, September.
    32. Murray Leibbrandt & Ingrid Woolard & Arden Finn & Jonathan Argent, 2010. "Trends in South African Income Distribution and Poverty since the Fall of Apartheid," OECD Social, Employment and Migration Working Papers 101, OECD Publishing.
    33. David Blanchflower & Alex Bryson, 2002. "Changes over time in union relative wage effects in the UK and the US revisited," NBER Working Papers 9395, National Bureau of Economic Research, Inc.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Chao, Chi-Chur & Trinh, Cong Tam & Nguyen, Xuan, 2023. "Carbon neutrality and wage inequality in a sustainable economy: New evidence from business dynamism," Economic Modelling, Elsevier, vol. 127(C).
    2. Yuan, Zhengrong & Ding, Hai & Yu, Qiuzuo, 2024. "High temperature, bargaining power and within-firm wage inequality: Evidence from China," Economic Modelling, Elsevier, vol. 135(C).
    3. Xinxin Ma, 2023. "Trade union and gender wage gap: Evidence from China," Economics Bulletin, AccessEcon, vol. 43(2), pages 1098-1110.
    4. Brändle, Tobias, 2024. "Unions and Collective Bargaining: The Influence on Wages, Employment and Firm Survival," GLO Discussion Paper Series 1457, Global Labor Organization (GLO).
    5. Uwe Jirjahn, 2025. "Unions and Collective Bargaining in Sub-Saharan Africa: Some Insights from Quantitative Studies," Research Papers in Economics 2025-01, University of Trier, Department of Economics.
    6. MA, Xinxin & CHENG, Jie, 2023. "The Impact of Trade Unions on the Gender Wage Gap : Evidence from China," Discussion Paper Series 752, Institute of Economic Research, Hitotsubashi University.
    7. Christopher Loewald & Nic Spearman Andreas Wrgtter, 2023. "Less sacrifice from collective to competitive price coordination in the South African economy," Working Papers 11049, South African Reserve Bank.
    8. Timothy Köhler & Robert Hill & Haroon Bhorat, 2022. "The effect of wage subsidies on job retention: Evidence from South Africa during the COVID-19 pandemic," WIDER Working Paper Series wp-2022-114, World Institute for Development Economic Research (UNU-WIDER).
    9. Oyenubi, Adeola & Mosomi, Jacqueline, 2024. "Utility of inequality sensitive measures of the gender wage gap: Evidence from South Africa," Economic Analysis and Policy, Elsevier, vol. 81(C), pages 576-590.
    10. Bassier, Ihsaan, 2022. "Collective bargaining and spillovers in local labor markets," LSE Research Online Documents on Economics 118057, London School of Economics and Political Science, LSE Library.
    11. Ihsaan Bassier, 2022. "Collective bargaining and spillovers in local labor markets," CEP Discussion Papers dp1895, Centre for Economic Performance, LSE.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Brändle, Tobias, 2024. "Unions and Collective Bargaining: The Influence on Wages, Employment and Firm Survival," GLO Discussion Paper Series 1457, Global Labor Organization (GLO).
    2. Susan Hayter & Bradley Weinberg, 2011. "Mind the Gap: Collective Bargaining and Wage Inequality," Chapters, in: Susan Hayter (ed.), The Role of Collective Bargaining in the Global Economy, chapter 6, Edward Elgar Publishing.
    3. Susan Hayter, 2015. "Unions and collective bargaining," Chapters, in: Janine Berg (ed.), Labour Markets, Institutions and Inequality, chapter 4, pages 95-122, Edward Elgar Publishing.
    4. David Card & Thomas Lemieux & W. Craig Riddell, 2020. "Unions and wage inequality: The roles of gender, skill and public sector employment," Canadian Journal of Economics/Revue canadienne d'économique, John Wiley & Sons, vol. 53(1), pages 140-173, February.
    5. Fernando Rios-Avila & Barry T. Hirsch, 2014. "Unions, Wage Gaps, and Wage Dispersion: New Evidence from the Americas," Industrial Relations: A Journal of Economy and Society, Wiley Blackwell, vol. 53(1), pages 1-27, January.
    6. Callaway, Brantly & Collins, William J., 2018. "Unions, workers, and wages at the peak of the American labor movement," Explorations in Economic History, Elsevier, vol. 68(C), pages 95-118.
    7. Julián Martinez Correa & Carlo Lombardo & Belén Bentivegna, 2018. "Convenio Colectivo, Sindicatos y Dispersión Salarial: Evidencia de Argentina," CEDLAS, Working Papers 0232, CEDLAS, Universidad Nacional de La Plata.
    8. Töngür, Ünal & Elveren, Adem Yavuz, 2014. "Deunionization and pay inequality in OECD Countries: A panel Granger causality approach," Economic Modelling, Elsevier, vol. 38(C), pages 417-425.
    9. Paula Armstrong & Janca Steenkamp, 2008. "South African Trade Unions: an Overview for 1995 to 2005," Working Papers 10/2008, Stellenbosch University, Department of Economics.
    10. David Card & Thomas Lemieux & W. Craig Riddell, 2003. "Unionization and Wage Inequality: A Comparative Study of the U.S, the U.K., and Canada," NBER Working Papers 9473, National Bureau of Economic Research, Inc.
    11. John Addison & Paulino Teixeira & Katalin Evers & Lutz Bellmann, 2014. "Indicative and Updated Estimates of the Collective Bargaining Premium in Germany," Industrial Relations: A Journal of Economy and Society, Wiley Blackwell, vol. 53(1), pages 125-156, January.
    12. Tingting Zhang & Morley Gunderson, 2020. "Impact of Occupational Licensing on Wages and Wage Inequality: Canadian Evidence 1998–2018," Journal of Labor Research, Springer, vol. 41(4), pages 338-351, December.
    13. Ramos, Raul & Sanromá, Esteban & Simón, Hipólito, 2018. "Wage Differentials by Bargaining Regime in Spain (2002-2014): An Analysis Using Matched Employer-Employee Data," IZA Discussion Papers 12013, Institute of Labor Economics (IZA).
    14. Matthew Knepper, 2020. "From the Fringe to the Fore: Labor Unions and Employee Compensation," The Review of Economics and Statistics, MIT Press, vol. 102(1), pages 98-112, March.
    15. Uwe Jirjahn, 2025. "Unions and Collective Bargaining in Sub-Saharan Africa: Some Insights from Quantitative Studies," Research Papers in Economics 2025-01, University of Trier, Department of Economics.
    16. Blanchflower, David G., 2006. "A Cross-Country Study of Union Membership," IZA Discussion Papers 2016, Institute of Labor Economics (IZA).
    17. Baker, Michael & Halberstam, Yosh & Kroft, Kory & Mas, Alexandre & Messacar, Derek, 2024. "The impact of unions on wages in the public sector: Evidence from higher education," CLEF Working Paper Series 67, Canadian Labour Economics Forum (CLEF), University of Waterloo.
    18. Michael Baker & Nicole M. Fortin, 2001. "Occupational gender composition and wages in Canada, 1987–1988," Canadian Journal of Economics/Revue canadienne d'économique, John Wiley & Sons, vol. 34(2), pages 345-376, May.
    19. Miracle Ntuli & Prudence Kwenda, 2013. "Labour Unions and Wage Inequality Among African Men in South Africa," Working Papers 13159, University of Cape Town, Development Policy Research Unit.
    20. Jacqueline Mosomi, 2019. "Distributional changes in the gender wage gap in the post-apartheid South African labour market," WIDER Working Paper Series wp-2019-17, World Institute for Development Economic Research (UNU-WIDER).

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:ecmode:v:97:y:2021:i:c:p:255-271. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.elsevier.com/locate/inca/30411 .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.