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Ranking of the best universities and research institutions in the United States according to the SCImago Institutions Rankings (SIR) 2009 World Report

The SIR 2009 World Report shows a ranking with more than 2000 of the best worldwide research institutions and organizations whose output surpass 100 scholarly publications during 2007. The ranking shows 5 indicators of institution research performance, stressing output (ordering criteria), collaboration and impact. Analyzed institutions are grouped into five research sectors: Government, Higher Education, Health, Corporate and Others. The resulting list includes institutions belonging to 84 countries from the five continents.
Please follow the link to read the report in Pdf format from SCImago web site.
Please check the table below to see the first 20 best research institutions and organizations in the United States.

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The score is computed as follows (please check the SCIMAGO web site for further details)

Institution's publication output reveals its scientific outcomes and trends in terms of published documents in scholarly journals. Publication output values are affected by institution sizes and research profiles, among others factors. This indicator forms the basis for more complex metrics.
At co-authored publications a score is assigned to each contributing institution through the author's institutional address.

Cites per Document (CxD)

This indicator shows the average scientific impact of an institution's publication output in terms of citations per documents. Shown values express average citations received by the institution's published documents over the whole period. The values are affected by institution research profiles.

International Collaboration (Int. Coll.)

This value shows the institution's output ratio that has been produced in collaboration with foreign
institutions. The values are computed by analyzing the institution's output whose affiliation includes more than one country address over the whole period.

Normalized SJR (Norm. SJR)

It shows the journal average importance where an institution output is published. The indicator used to calculate this average is the SJR indicator (www.scimagojr.com). A value larger than 1 means that "on average" the papers of an institution have been published on journals whose “importance” is above the average in its scientific field. Whereas a value smaller than 1
means that "on average" the papers of an institution have been published on journals whose“importance” is below the average in its scientific field.

Field Normalized Citation Score (Norm. Cit.)

This indicator reveals the ratio between the average scientific impact of an institution and the world average impact of publications of the same time frame and subject area. It is computed using the methodology established by Karolinska Intitutet in Sweden where it is named "Item oriented field normalized citation score average" since the normalization of the citation values is done on an individual article level. Further information on the methodology at Bibliometric Handbook for Karolinska Institutet.
The values are expressed in percentages and show the relationship of the institution's average impact to the world average, which is 1, i.e. a score of 0.8 means the institution is cited 20% below average and 1.3 means the institution is cited 30% above average.

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