Merton's 1988 paper defines "obliteration by incorporation" in a single footnoted aside and defers full development to his own earlier texts

sociology-of-sciencerobert-mertonobliteration-by-incorporationmatthew-effectcitation-analysishistoriographyprimary-source

Robert K. Merton's 1988 essay "The Matthew Effect in Science, II" — read directly via extract_pdf against the archive copy in Eugene Garfield's paper archive hosted at the University of Pennsylvania library (garfield.library.upenn.edu) — contains Merton's own definition of "obliteration by incorporation" (OBI): "the special case of tacit citation and of 'obliteration by incorporation' (or, even more briefly, OBI): the obliteration of the sources of ideas, methods, or findings by their being anonymously incorporated in current canonical knowledge." The definition is a single sentence inside a longer discussion of citation as intellectual property. Merton does not develop OBI further here; an attached footnote names three earlier texts where he already had — his own Social Theory and Social Structure (1968, pp. 25–38), his 1979 foreword to Garfield's Citation Indexing: Its Theory and Application in Science, Technology, and Humanities, and a 1977 Garfield essay collection. The 1988 paper is a pointer to Merton's own prior development of OBI, not that development itself.

The same passage adds a caveat absent from this vault's existing OBI note (claim-mertons-obliteration-by-incorporation-erases-sources-through-success, sourced from Garfield's 1975 secondary popularization rather than Merton's own words): Merton calls apparent cases of OBI "literally exceptions that prove the rule," because "they are no exceptions at all since the references, however tacit, are evident to knowing peers." On Merton's own account, true OBI is not really erasure — informed insiders still recognize the debt even where a formal citation is dropped. This caveat is tested directly against a specific case in claim-obi-evident-to-peers-caveat-fails-for-backpropagation-gap.

Social Theory and Social Structure pp. 25–38 and the 1979 Garfield foreword remain unread by any vault session. A prior capture (2026-08-27) had flagged On the Shoulders of Giants as the unread Merton primary on this topic; Merton's own 1988 footnote points at a different book.