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We estimate the value of the Portuguese electronic scientific information consortium b-on by using two alternative evaluation methodologies: a) the value of the time saved by using this electronic resource; and b) the contingent valuation method to estimate how much the user is willing to pay for the service. Our results show wide differences in use patterns, with professors, researchers and PhD students having a more intense use of digital library services than undergraduate and masters students. Moreover, the benefit-cost ratios computed using the two valuation techniques indicate that the value of the electronic scientific information consortium b-on is well above its costs. Finally, the study shows that the valuation of b-on is higher for the user groups with higher percentage use of digital services.<\/jats:p>","DOI":"10.1177\/0961000611411708","type":"journal-article","created":{"date-parts":[[2011,6,13]],"date-time":"2011-06-13T20:50:21Z","timestamp":1307998221000},"page":"146-156","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":8,"title":["Measuring the economic value of the electronic scientific information services in Portuguese academic libraries"],"prefix":"10.1177","volume":"43","author":[{"given":"Luiza","family":"Baptista Melo","sequence":"first","affiliation":[{"name":"CIDEHUS, Universidade de \u00c9vora, Portugal,"}]},{"given":"Cesaltina","family":"Pacheco Pires","sequence":"additional","affiliation":[{"name":"CEFAGE, Universidade de \u00c9vora, Portugal"}]}],"member":"179","published-online":{"date-parts":[[2011,6,13]]},"reference":[{"key":"atypb1","doi-asserted-by":"publisher","DOI":"10.1108\/03074800510634973"},{"key":"atypb2","volume-title":"The economic impact of public libraries on South Carolina","author":"Barron D.","year":"2005"},{"key":"atypb3","volume-title":"Measuring Our Values","author":"British Library","year":"2004"},{"key":"atypb4","doi-asserted-by":"publisher","DOI":"10.1108\/02640470710729083"},{"key":"atypb5","doi-asserted-by":"publisher","DOI":"10.1108\/08880450710747434"},{"key":"atypb6","volume-title":"Measuring Your Library\u2019s Value: How to Do a Cost-Benefit Analysis for Public Library","author":"Elliott DS","year":"2007"},{"key":"atypb7","volume-title":"B-on: Boletim Estat\u00edstico 2007","author":"FCCN - Funda\u00e7\u00e3o para a Computa\u00e7\u00e3o Cient\u00edfica Nacional","year":"2008"},{"key":"atypb8","volume-title":"Estat\u00edsticas Nacionais: Ensino Superior","author":"GPEARI - Gabinete de Planeamento, Estrat\u00e9gia, Avalia\u00e7\u00e3o e Rela\u00e7\u00f5es Internacionais","year":"2008"},{"key":"atypb9","volume-title":"Libraries: The undiscovered National Resources. 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