Over the past years a number of studies have appeared on the incidence and returns to overeducation in the labor market. In these studies various definitions of educational mismatches have been used. In this paper we analyze the validity and reliability of three of these definitions. It is found that the definitions differ widely in the workers who are identified as over‐ or undereducated. Further, the methods yield different estimates of the returns to over‐ and undereducation.
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Groot et al. (2000) studied this question.
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