De International Standard Classification of Education 2011 [ISCED-2011] Verbetering of verwarring? ISCED en ISLED in ESS R5 & R6.”
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We present a new version of the International Standard Level of Education [ISLED] to be used in connection with the new International Standard Classification of Education 2011 [ISCED-2011] as it has been applied in ESS R5 & R6. We argue that the implementation of ISCED-2011 in its 3-digit format to code country-specific qualifications is an important innovation in the practice of comparative education measurement, as it facilitates the harmonization of qualificatons at a relatively detailed level, also in otherdata. Scaling these qualifications by the ISLED scale creates a powerful instrument with considerable better measurement quality than hitherto much used indicators, such as the duration measure EDUYRS and common denominator harmonization EDULVLa that ESS also provides.