Every reference with a DOI in the deposited reference list resolved to a known
work in Crossref or DataCite at the dated check, and none carried a retraction,
withdrawal, or removal notice.
5 without a DOI — not checked. A reference
deposited without a DOI is never matched by title or guessed at; it stays outside the checked
set, and this line discloses that.
The 5 references without a DOI — listed, not checked
no DOI — not checkedDe Jong, U., Roeleveld, J. & Webbink, H. D. (1997). Verder Studeren in de jaren negentig, Studiekeuze en studieloopbaan over de periode 1991–1995 (Studying in the nineties, educational decisions and study career 1991–1995, reeks Verder Studeren, Eindrapport, Den Haag: Ministerie van Onderwijs en Wetenschappen.
no DOI — not checked10.1016/S0272-7757(03)00080-3_BIB7
no DOI — not checkedKodde, D. A. & Ritzen, J. M. M. (1986). Vraag naar Hoger Onderwijs (Demand for higher education), Eindrapport, Ministerie van Onderwijs en Wetenschappen, reeks Beleidsgerichte Studies Hoger Onderwijs en Wetenschappelijk Onderzoek, nr. 6, Den Haag: Ministerie van Onderwijs en Wetenschappen.
no DOI — not checkedAdolescent econometricians: How do youths infer the returns to schooling?
no DOI — not checkedWebbink, H. D. (1999). Student Decisions and Consequences, Ph.D. thesis, University of Amsterdam, SEO-report nr 511.
What this badge says. CiteStamped means the CHECKABLE references of this
work were clean at the dated check: each resolved to a known work in a public registry, and none
carried a retraction notice at that time. It says nothing about the quality, findings,
or importance of the work itself, and nothing about references deposited without a DOI.
checked 2026-07-25 — re-checked daily as this page is visited;
titles and statuses come from Crossref and DataCite and are not part of the signed record
Both snippets point at the live badge image and link back to this page. The
badge re-renders from the daily check, so an embed never goes stale by more than a day of visits.