"Using two periods' panel data from the Swiss Graduate Survey, this study examines the incidence, persistence and wage effects of overeducation. An alternative measure of overeducation that accounts for graduate heterogeneity in perceived skills mismatch is used. This analysis differs from previous panel data studies in that two estimation methods are applied to control for unobserved ability. Results indicate that graduates who are overeducated and mismatched in skills are the most penalized in terms of earnings. This evidence is still valid when unobserved ability is accounted for, whereas the pay penalty is no more significant for graduates who are overeducated but matched in skills. This result is robust to different definitions of perceived skills mismatch and is consistent with the notion that apparent overeducation reflects a lack of unobserved attributes, such as ability."

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