Over-Education and Wages in the Labour Market: Evidence from Iran's Micro-Data

Document Type : Research Paper


1 Associate Professor, Graduate School of Management and Economics, Sharif University of Technology

2 Postgraduate student at Adam Smith Business School- University of Glasgow, Berlin School of Economics and Law The University of Glasgow United Kingdom


Over the recent past years the supply of educated labor has increased in the Iranian labor market. This change has led to over-education. The concepts of over-education refers to the individual possesses a level of education that is above the required level of education to perform a certain job. This study has dealt with the incidence of Over-education and its wage consequences in the labor market of Iran. The years of education needed for each job has been determined using two criteria, i.e., realized match and job analysis. Based on these two criteria, individuals have been classified in three groups including adequately educated, over-educated and under-educated. More years of schooling, less job experience, being male and employment in private sector lead to higher probability of being overeducated. The wage effect of the relationship between education and the individual’s job is studied using Duncan & Hoffman model. The findings of this model based on  realized match criterion show that there is a direct and significant relationship between the years of education which  is adequate for each job and monthly salary of the individuals. However, the return of years of over-education and under-education is insignificant.
JEL Classification: J24, I21.


Alba-Ramirez, A. (1993). Mismatch in the Spanish labor market: over  -education? The Journal of Human Resources, 27, 259–78.
Assaad, R., and Roudi-Fahimi, F. (2007). Youth in the Middle East and North Africa: Demographic opportunity or challenge? Washington, DC: Population Reference Bureau.
Bauer, T. (2002) “Educational Mismatch and Wages: A Panel Analysis.” Economics of Education Review, 21, 221–229.
Becker, G. S. (2009). Human capital: A theoretical and empirical analysis, with special reference to education. University of Chicago Press.
Card, D. (1999). The causal effect of education on earnings. Handbook of labor Economics, 3, 1801-1863.
Chevalier, A. , & Lindley, J. (2009) “Over-education and the skills of UK graduates”, Journal of the Royal Statistical Society: Series A, 172, 307-337.
Clark, N. (2013). Education in Egypt. World Education News and Reviews. 
Di Pietro, G., & Urwin, P. (2006) “Education and skills mismatch in the Italian graduate labour market”, Applied Economics, 38:1, 79-93
Dolton, P., & Vignoles, A. (2000). The incidence and effects of Over-education in the UK graduate labour market. Economics of Education Review, 19, 179–198.
Duncan, G. J. , &Hoffman, S. (1981). The incidence and wage effects of over-education, Economics of Education Review, 1, 75–86.
Freeman, R. B. (1976). The overeducated American. New York: Academic Press.
Groot, W., & Brink, M. V. D. (1997). Allocation and the returns to over-education in the UK. Education Economics, 5(2). 169-183.
Hartog, J. (2000). Over-education and earnings: where are we, where should we go? Economics of Education Review. 19, 131–147.
Hausman, J. A. (1978). Specification Tests in Econometrics. Econometrica, 46(6), 1251-1271.
Leuven, E., & Oosterbeek, H. (2011). Over-education  and  mismatch  in the  labor market. Handbook of the Economics of Education, 4, 283-326.
Levels, M., van der Velden, R., & Allen, J. (2013). Educational mismatches and skills: new empirical tests of old hypotheses.
Mavromaras, K., McGuinness, S., O'Leary, N., Sloane, P. and Wei, Z. (2013). Job Mismatches and Labour Market Outcomes: Panel Evidence on University Graduates.Economic Record, 89, 382–395.
McGoldrick, K., & Robst, J. (1996). Gender differences in Over-education: a test of the theory of differential overqualification. The American Economic Review, 280-284.
McGuinness, S. (2006). Over-education   in the labour market. Journal of Economic Surveys, 2(3), 387-418.
Mincer, J. A. (1974). Schooling and earnings. In Schooling, experience, and earnings (pp. 41-63). Columbia University Press.
Rumberger, R. W. (1987). The Impact of Surplus Schooling on Productivity and Earnings. Journal of Human resources, 22(1).
Sicherman N., & Galor O., (1990). A Theory of Career Mobility. Journal of Political Economy, 98(1), 169-192.
Spence, M. (1973). Job market signaling. The quarterly journal of Economics, 87(3), 355-374.
Thurow, L. C. (1975). Generating Inequality. New York, NY: Basic Books.
Tsang, M. (1987). The impact of underutilization of education of productivity: a case study of the U.S. Bell companies. Economics of Education Review, 11, 239–234.
Tsang, M., & Levin, H. (1985). Economics of Education Review, 4(2), 93-104.