Webis-STEREO-21 (Full Version)

We present the Webis-STEREO-21 dataset, a massive collection of <strong>S</strong>cientific <strong>Te</strong>xt <strong>Re</strong>use in <strong>O</strong>pen-access publications. It contains more than 91 million cases of reused text passages found in 4.2 million unique open-access publications. Featuring a high coverage of scientific disciplines and varieties of reuse, as well as comprehensive metadata to contextualize each case, our dataset addresses the most salient shortcomings of previous ones on scientific writing. Webis-STEREO-21 allows for tackling a wide range of research questions from different scientific backgrounds, facilitating both qualitative and quantitative analysis of the phenomenon as well as a first-time grounding on the base rate of text reuse in scientific publications.