Human Capital Disparities and Earnings Inequality in The Portuguese Private Labour Market

Derick Almeida, João A. S. Andrade, Maria Adelaide Duarte and Marta Simões ()
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João A. S. Andrade: CeBER, Faculty of Economics

Social Indicators Research: An International and Interdisciplinary Journal for Quality-of-Life Measurement, 2022, vol. 159, issue 1, No 6, 145-167

Abstract: Abstract This paper examines human capital inequality and how it relates to earnings inequality in Portugal using data from Quadros de Pessoal for the period 1986–2017. The objective is threefold: (i) show how the distribution of human capital has evolved over time; (ii) investigate the association between human capital inequality and earnings inequality; and (iii) analyse the role of returns to schooling, together with human capital inequality, in the explanation of earnings inequality. Our findings suggest that human capital inequality, computed based on the distribution of average years of schooling of employees working in the Portuguese private labour market, records a positive trend until 2007 and decreases from this year onwards, suggesting the existence of a Kuznets curve of education relating educational attainment levels and education inequality. Based on the decomposition of a Generalized Entropy index (Theil N) for earnings inequality, we observe that inequality in the distribution of human capital plays an important role in the explanation of earnings inequality, although this role has become less important over the last decade. Using Mincerian earnings regressions to estimate the returns to schooling together with the Blinder-Oaxaca decomposition of real hourly earnings we confirm that there are two important forces associated with the observed decrease in earnings inequality: a reduction in education inequality and compressed returns to schooling, mainly in tertiary education.

Keywords: Human capital; Schooling; Earnings inequality; Returns to schooling; Decomposition analysis; Portugal (search for similar items in EconPapers)
JEL-codes: D31 I24 I26 (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1007/s11205-021-02745-0

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