Abstract
Abstract (des preprints): Bibliographic databases (including databases based on open access) are routinely used for
bibliometric research. The value of a specific database depends to a large extent on the coverage of the
discipline(s) under study. A number of studies have determined the coverage of databases in specific
disciplines focusing on inter-disciplinary differences. However, little is known about the potential
existence of intra-disciplinary differences in database coverage. Focusing on intra-disciplinary
differences, the paper documents large database coverage differences within two disciplines (economics
and psychology). The point extends to include both the uneven coverage of specialties and research
traditions. The implications for bibliometric research are discussed, and precautions which need to be
taken are outlined.
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