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Effects of the Minimum Wage (MW) on Income Inequality: Systematic Review and Analysis of the Spanish Case

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  • Manuela A. de Paz-Báñez

    (Department of Economics, University of Huelva, 21071 Huelva, Spain)

  • Celia Sánchez-López

    (Department of Economics, University of Huelva, 21071 Huelva, Spain)

  • María José Asensio-Coto

    (Department of Economics, University of Huelva, 21071 Huelva, Spain)

Abstract

The minimum wage has become a standard measure in the economic and social policies of countries all over the world. The primary objective of this measure is to guarantee that workers receive a minimum wage that allows them to lead a decent life, thereby reducing inequality and poverty. However, studies on the minimum wage have not focused on assessing the effects on these dimensions but only on employment. The objective of this study is to address this research gap by analysing the effects of minimum wage increases on income inequality and poverty. To this end, firstly, a systematic review of the empirical analyses was conducted using the PRISMA methodology, with a view to ensuring that all empirical evidence was available. Secondly, the Spanish case was examined. The significant increase in minimum wage in Spain in 2019 (21.3% in real terms) presents an invaluable opportunity to utilise this event as a natural experiment to generate new evidence. A difference-in-differences approach was employed to assess the impact of this phenomenon in the period 2018–2019 with microdata from European Statistics on Income and Living Conditions (EU-SILC for Spain). In doing so, two basic scientific contributions were made. The first one, a systematic, exhaustive, and up-to-date literature review (up to June 2024), as there is, to our knowledge, no recent systematic review of this relationship (minimum wage vs. inequality). The available evidence indicates a clear inverse relationship between the minimum wage and inequalities and poverty. The second one, regarding the Spanish case, there has been a dearth of scientific studies on this subject. Thus, this paper provides new scientific evidence demonstrating that a significant increase in the minimum wage can significantly improve the income of low-wage earners, thereby reducing income inequality and in-work poverty. Furthermore, there is evidence of a spillover effect towards income groups closer to the treatment group.

Suggested Citation

  • Manuela A. de Paz-Báñez & Celia Sánchez-López & María José Asensio-Coto, 2024. "Effects of the Minimum Wage (MW) on Income Inequality: Systematic Review and Analysis of the Spanish Case," Economies, MDPI, vol. 12(9), pages 1-37, August.
    • Handle: RePEc:gam:jecomi:v:12:y:2024:i:9:p:223-:d:1462811
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    References listed on IDEAS

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    1. Arindrajit Dube, 2019. "Minimum Wages and the Distribution of Family Incomes," American Economic Journal: Applied Economics, American Economic Association, vol. 11(4), pages 268-304, October.
    2. Sotomayor, Orlando J., 2021. "Can the minimum wage reduce poverty and inequality in the developing world? Evidence from Brazil," World Development, Elsevier, vol. 138(C).
    3. Charles Brown & Curtis Gilroy & Andrew Kohen, 1982. "The Effect of the Minimum Wage on Employment and Unemployment: A Survey," NBER Working Papers 0846, National Bureau of Economic Research, Inc.
    4. Mariano Bosch & Marco Manacorda, 2010. "Minimum Wages and Earnings Inequality in Urban Mexico," American Economic Journal: Applied Economics, American Economic Association, vol. 2(4), pages 128-149, October.
    5. Susana HERRERO OLARTE & Fabián VILLARREAL SOSA, 2020. "¿Influyen Los Salarios Mínimos En Los Ingresos De Los Más Pobres De Sudamérica?," Regional and Sectoral Economic Studies, Euro-American Association of Economic Development, vol. 20(2), pages 139-150.
    6. David H. Autor & Alan Manning & Christopher L. Smith, 2016. "The Contribution of the Minimum Wage to US Wage Inequality over Three Decades: A Reassessment," American Economic Journal: Applied Economics, American Economic Association, vol. 8(1), pages 58-99, January.
    7. Marco Caliendo & Alexandra Fedorets & Malte Preuss & Carsten Schröder & Linda Wittbrodt, 2023. "The short- and medium-term distributional effects of the German minimum wage reform," Empirical Economics, Springer, vol. 64(3), pages 1149-1175, March.
    8. Brown, Charles & Gilroy, Curtis & Kohen, Andrew, 1982. "The Effect of the Minimum Wage on Employment and Unemployment," Journal of Economic Literature, American Economic Association, vol. 20(2), pages 487-528, June.
    9. Mehmet Nazım Tamkoç & Orhan Torul, 2020. "Cross-Sectional Facts for Macroeconomists: Wage, Income and Consumption Inequality in Turkey," The Journal of Economic Inequality, Springer;Society for the Study of Economic Inequality, vol. 18(2), pages 239-259, June.
    10. David Card & John E. DiNardo, 2002. "Skill-Biased Technological Change and Rising Wage Inequality: Some Problems and Puzzles," Journal of Labor Economics, University of Chicago Press, vol. 20(4), pages 733-783, October.
    11. Ihsaan Bassier & Vimal Ranchhod, 2024. "Can Minimum Wages Effectively Reduce Poverty under Low Compliance? A Case Study from the Agricultural Sector in South Africa," Review of Political Economy, Taylor & Francis Journals, vol. 36(2), pages 398-419, April.
    12. Suzana Laporšek & Milan Vodopivec & Matija Vodopivec, 2021. "Lowering wage inequality with the minimum wage increase in Slovenia," International Journal of Sustainable Economy, Inderscience Enterprises Ltd, vol. 13(3), pages 306-321.
    13. Joe, Dong-Hee & Moon, Seongman, 2020. "Minimum Wages and Wage Inequality in the OECD Countries," East Asian Economic Review, Korea Institute for International Economic Policy, vol. 24(3), pages 253-273, September.
    14. Mark C. Long, 2022. "Seattle's local minimum wage and earnings inequality," Economic Inquiry, Western Economic Association International, vol. 60(2), pages 528-542, April.
    15. Bassier, Ihsaan & Ranchhod, Vimal, 2024. "Can minimum wages effectively reduce poverty under low compliance? A case study from the agricultural sector in South Africa," LSE Research Online Documents on Economics 122711, London School of Economics and Political Science, LSE Library.
    16. HERRERO-OLARTE,Susana, 2022. "Salario Mínimo, Pobreza Y Clase Media. El Caso Ecuatoriano," Regional and Sectoral Economic Studies, Euro-American Association of Economic Development, vol. 22(1), pages 95-106.
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