Paul Donner

This article reports the results of a study of the correctness of document type assignments in the commercial citation index database Web of Science (SCIE, SSCI, AHCI collections). The document type assignments for publication records are compared to those given on the official journal websites or in the publication full-texts for a random sample of 791 Web of Science records across the four document type categories articles, letters, reviews and others, according to the definitions of WoS. The proportion of incorrect assignments across document types and its influence on document specific normalized citations scores are analysed. It is found that document type data is correct in 94% of records. [...]

In this article I investigate the shortcomings of exact string match-based author self-citation detection methods. The contributions of this study are twofold. First, I apply a fuzzy string matching algorithm for selfcitation detection and benchmark this approach and other common methods of exclusively author namebased self-citation detection against a manually curated ground truth sample. Near full recall can be achieved with the proposed method while incurring only negligible precision loss. Second, I report some important observations from the results about the extent of latent self-citations and their characteristics and give an example of the effect of improved self-citation detection on the document level self-citation rate of [...].

Scientific work has become increasingly organized as teamwork and most research publications are now joint work of several co-authors. While of utmost importance for fair and valid research evaluation, the quantitative patterns of relative work contribution by team members to co-authored publications have remained opaque. Here we present an empirical study of contribution patterns. We analyze a large data set of author-provided percent contribution claims for co-authored scientific publications submitted as part of applications to scholarship programs. We find that the distribution of work input in co-authored publications is overwhelmingly unequal. [...]