According to Slovak media the Speaker of the Slovakian Parliament has been accused of having copied his JuDR doctoral thesis in law from five other sources. The politician put his thesis in the university library under embargo, when the accusations first arose. Comenius University announced that a doctoral dissertation with the same title and same number of pages was missing in its university archive and that an enquiry has been launched.

On September 24, 2017 the Dutch newspaper de Volkskrant reported on an investigation into self-plagiarism (zelfplagiaat) that was conducted by a Nijmengen research group. The sociologist of science and his PhD student analysed 922 publications by Dutch researchers from recent years. In economics, 14 % of the papers contained text from previous publications of the author(s), in psychology the figure was 5 %. They even found a duplicate article republished with just one small change, and two highly similar articles by the same author in the same issue of a journal. They also found that authors who publish more papers are more likely to reuse text.