PDF《Impact for Higher Quality Research》

Davis &

Fromerth 2007;

Henneken et al 2006;

Moed 2006). The present study was carried out to test this hypothesis by comparing self-selected OA with mandated OA on the basis of the research article output of the four institutions with the longest-standing OA mandates: (i) Southampton University (School of Electronics &

Computer Science) in the UK (since 2002);

(ii) CERN (European Organization for Nuclear Research) in Switzerland (since November, 2003);

(iii) Queensland University of Technology in Australia (since February 2004);

(iv) Minho University in Portugal (since December, 2004). Method The objective was to compare citation counts -- always within the same journal/year -- for OA (O) and non-OA (?) articles, comparing the O/? citation ratios for OA that was self-selected (S) vs. mandated (M). (The critical comparisons were hence SO/? vs. MO/?.) The sample covered articles published between

2002 and 2006.3 The metadata

1 ROARMAP (Registry of Open Access Repository Material Archiving Policies) http://www.eprints.org/openaccess/policysignup/

2 EUA consists of more than

800 universities, in

46 countries (in January 2009)

3 About two years need to elapse for the citations from the most recent year to stabilize.

5 for the articles were collected from the four institutional repositories, as well as from the Thomson-Reuters citation database.4 The effect of OA on citation impact cannot be reliably tested by comparing OA and non- OA journals because no two journals have identical subject matter, track-records and quality-standards (nor are there as yet enough established OA journals in most fields). The comparison must hence be between OA and non-OA articles published within the same (non-OA) journals (Harnad and Brody, 2004). For each mandated article, Mi, deposited in our four mandated IRs we accordingly collected, as our pool of nonmandated controls for comparison, all articles Nj publis........