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The impact of surplus skills on earnings: Extending the over-education model to language proficiency

, Department of Economics, George Washington University, United States ; , School of Economics and Finance, Curtin University, Australia

Economics of Education Review Volume 36, Number 1, ISSN 0272-7757 Publisher: Elsevier Ltd


This paper examines whether the framework developed in the educational mismatch field of research can be generalized to language skills. It uses data from the Occupational Information Network (O*NET) database and both “Worker Self-Assessment” and “Realized Matches” procedures to quantify expected levels of English skills in each of over 500 occupations in the US Census. Earnings data from the 2000 US Census for adult male immigrant workers are then examined in relation to these occupational English requirements using the over-education, required education, under-education (ORU) approach. The analyses show that earnings are related to a “correct” matching of an immigrant's language skills with what is expected in his occupation. Mismatches have a small effect on earnings – positive for proficiency in excess of the norms in the occupation and negative for deficits in proficiency. The findings are robust with respect to a range of measurement and specification issues typically examined in ORU studies. It is concluded that the ORU model offers a framework for analysis which can be readily generalized to other forms of investment in human capital.


Chiswick, B.R. & Miller, P.W. (2013). The impact of surplus skills on earnings: Extending the over-education model to language proficiency. Economics of Education Review, 36(1), 263-275. Elsevier Ltd. Retrieved May 13, 2021 from .

This record was imported from Economics of Education Review on January 28, 2019. Economics of Education Review is a publication of Elsevier.

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