{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,3]],"date-time":"2026-03-03T19:52:34Z","timestamp":1772567554708,"version":"3.50.1"},"reference-count":29,"publisher":"Emerald","issue":"7","license":[{"start":{"date-parts":[[2014,11,4]],"date-time":"2014-11-04T00:00:00Z","timestamp":1415059200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.emerald.com\/insight\/site-policies"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2014,11,4]]},"abstract":"<jats:sec><jats:title content-type=\"abstract-heading\">Purpose<\/jats:title><jats:p>\u2013 The purpose of this paper is to describe the obsolescence process of Microsoft Academic Search (MAS) as well as the effects of this decline in the coverage of disciplines and journals, and their influence in the representativeness of organizations.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Design\/methodology\/approach<\/jats:title><jats:p>\u2013 The total number of records and those belonging to the most reputable journals (1,762) and organizations (346) according to the Field Rating indicator in each of the 15 fields and 204 sub-fields of MAS, have been collected and statistically analysed in March 2014, by means of an automated querying process via http, covering academic publications from 1700 to present.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Findings<\/jats:title><jats:p>\u2013 MAS has no longer been updated since 2013, although this phenomenon began to be glimpsed in 2011, when its coverage plummeted. Throughout 2014, indexing of new records is still ongoing, but at a minimum rate, without following any apparent pattern.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Research limitations\/implications<\/jats:title><jats:p>\u2013 There are also retrospective records being indexed at present. In this sense, this research provides a picture of what MAS offered during March 2014 being queried directly via http.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Practical implications<\/jats:title><jats:p>\u2013 The unnoticed obsolescence of MAS affects to the quality of the service offered to its users (both those who engage in scientific information seeking and also those who use it for quantitative purposes).<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Social implications<\/jats:title><jats:p>\u2013 The predominance of Google Scholar (GS) as monopoly in the academic search engines market as well as the prevalence of an open construction model (GS) vs a closed model (MAS).<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Originality\/value<\/jats:title><jats:p>\u2013 A complete longitudinal analysis of disciplines, journals and organizations on MAS has been performed for the first time identifying an unnoticed obsolescence. Any public explanation or disclaimer note has been announced from the responsible company, something incomprehensible given its implications for the reliability and validity of bibliometric data provided on disciplines, journals, authors and congress as well as their fair representation on the academic search engine.<\/jats:p><\/jats:sec>","DOI":"10.1108\/oir-07-2014-0169","type":"journal-article","created":{"date-parts":[[2014,11,11]],"date-time":"2014-11-11T04:04:35Z","timestamp":1415678675000},"page":"936-953","source":"Crossref","is-referenced-by-count":27,"title":["The silent fading of an academic search engine: the case of Microsoft Academic Search"],"prefix":"10.1108","volume":"38","author":[{"given":"Enrique","family":"Ordu\u00f1a-Malea","sequence":"first","affiliation":[]},{"given":"Alberto","family":"Mart\u00edn-Mart\u00edn","sequence":"additional","affiliation":[]},{"given":"Juan","family":"M. Ayllon","sequence":"additional","affiliation":[]},{"given":"Emilio","family":"Delgado L\u00f3pez-C\u00f3zar","sequence":"additional","affiliation":[]}],"member":"140","reference":[{"key":"key2020122721045962800_b1","unstructured":"Beel, J. and Gipp, B. (2009), \u201cGoogle Scholar's ranking algorithm: an introductory overview\u201d, Proceedings of the 12th International Conference on Scientometrics and Informetrics (ISSI\u201909), BIREME\/PAHO\/WHO and Federal University of Rio de Janeiro, Vol. 1, pp. 230-241."},{"key":"key2020122721045962800_b2","doi-asserted-by":"crossref","unstructured":"Beel, J. , Gipp, B. and Wilde, E. (2010), \u201cAcademic search engine optimization (ASEO)\u201d, Journal of Scholarly Publishing, Vol. 41 No. 2, pp. 176-190.","DOI":"10.3138\/jsp.41.2.176"},{"key":"key2020122721045962800_b3","doi-asserted-by":"crossref","unstructured":"Butler, D. (2011), \u201cComputing giants launch free science metrics: new Google and Microsoft services promise to democratize citation data\u201d, Nature, Vol. 476 No. 7358, p. -.","DOI":"10.1038\/476018a"},{"key":"key2020122721045962800_b4","unstructured":"Carlson, S. (2006), \u201cChallenging Google, Microsoft unveils a search tool for scholarly articles\u201d, Chronicle of Higher Education, Vol. 52 No. 33, p. -."},{"key":"key2020122721045962800_b5","doi-asserted-by":"crossref","unstructured":"Delgado L\u00f3pez-C\u00f3zar, E. and Cabezas-Clavijo, A. (2013), \u201cRanking journals: could Google Scholar Metrics be an alternative to Journal Citation Reports and Scimago Journal Rank?\u201d, Learned Publishing, Vol. 26 No. 2, pp. 101-113.","DOI":"10.1087\/20130206"},{"key":"key2020122721045962800_b6","doi-asserted-by":"crossref","unstructured":"Delgado L\u00f3pez-C\u00f3zar, E. , Robinson-Garc\u00eda, N. and Torres-Salinas, D. (2014), \u201cThe Google Scholar experiment: how to index false papers and manipulate bibliometric indicators\u201d, Journal of the Association for Information Science and Technology, Vol. 65 No. 3, pp. 446-454.","DOI":"10.1002\/asi.23056"},{"key":"key2020122721045962800_b7","unstructured":"Gardner, T. and Inger, S. (2013), How Readers Discover Content in Scholarly Journals. Comparing the Changing User Behaviour Between 2005 and 2012 and Its Impact on Publisher Web Site Design and Function, Renew Training, Abingdon."},{"key":"key2020122721045962800_b8","unstructured":"Gon\u00e7alves, G.D. , Figueiredo, F. , Almeida, J.M. and Gon\u00e7alves, M.A. (2014), \u201cCharacterizing scholar popularity: a case study in the computer science research community\u201d, Joint Conference on Digital Libraries (JCDL 2014), 8-12 September, London, available at: http:\/\/homepages.dcc.ufmg.br\/\u223cflaviov\/papers\/goncalves2014-dl.pdf (accessed 19 August 2014)."},{"key":"key2020122721045962800_b9","doi-asserted-by":"crossref","unstructured":"Haley, M.R. (2014), \u201cRanking top economics and finance journals using Microsoft academic search versus Google scholar: how does the new publish or perish option compare?\u201d, Journal of the Association for Information Science and Technology, Vol. 65 No. 5, pp. 1079-1084.","DOI":"10.1002\/asi.23080"},{"key":"key2020122721045962800_b10","doi-asserted-by":"crossref","unstructured":"Haustein, S. , Peters, I. , Bar-Ilan, J. , Priem, J. , Shema, H. and Terliesner, J. (2014), \u201cCoverage and adoption of altmetrics sources in the bibliometric community\u201d, Scientometrics, Vol. 101 No. 2, pp. 1145-1163.","DOI":"10.1007\/s11192-013-1221-3"},{"key":"key2020122721045962800_b11","unstructured":"Jacs\u00f3, P. (2005), \u201cAs we may search \u2013 comparison of major features of the Web of Science, Scopus, and Google Scholar\u201d, Current Science, Vol. 89 No. 9, pp. 1537-1547."},{"key":"key2020122721045962800_b12","doi-asserted-by":"crossref","unstructured":"Jacs\u00f3, P. (2008a), \u201cGoogle scholar revisited\u201d, Online Information Review, Vol. 32 No. 1, pp. 102-114.","DOI":"10.1108\/14684520810866010"},{"key":"key2020122721045962800_b13","unstructured":"Jacs\u00f3, P. (2008b), \u201cLive Search Academic, Gale: P\u00e9ter's Digital Reference Shelf\u201d, available at: web.archive.org\/web\/20070207104154\/http:\/\/projects.ics.hawaii.edu\/\u223cjacso\/gale\/windows-live-acad\/windows-live-acad.htm (accessed 24 September 2014)."},{"key":"key2020122721045962800_b14","unstructured":"Jacs\u00f3, P. (2010), \u201cMicrosoft Academic Search, Gale: P\u00e9ter's Digital Reference Shelf\u201d, available at: http:\/\/www.jacso.info\/PDFs\/jacso-microsoft-academic-search-2010-Gale.doc (accessed 24 September 2014)."},{"key":"key2020122721045962800_b15","doi-asserted-by":"crossref","unstructured":"Jacs\u00f3, P. 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(2014), \u201cEmpirical evidences in citation-based search engines: is Microsoft Academic Search dead?\u201d, Working Paper No. 16, EC3 Research Group, Universidad de Granada, Granada."},{"key":"key2020122721045962800_b23","doi-asserted-by":"crossref","unstructured":"Ortega, J.L. (2014a), Academic Search Engines: A Quantitative Outlook, Elsevier.","DOI":"10.1533\/9781780634722.143"},{"key":"key2020122721045962800_b24","doi-asserted-by":"crossref","unstructured":"Ortega, J.L. (2014b), \u201cInfluence of co-authorship networks in the research impact: ego network analyses from Microsoft Academic Search\u201d, Journal of Informetrics, Vol. 8 No. 3, pp. 728-737.","DOI":"10.1016\/j.joi.2014.07.001"},{"key":"key2020122721045962800_b25","doi-asserted-by":"crossref","unstructured":"Ortega, J.L. and Aguillo, I.F. 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