Document ID: EPA-HQ-ORD-2008-0926-0007
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2009-03-13T04:00Z

Comparison of the 2007 and 2009 Science and Technology for
Sustainability Research Program Bibliometric Analysis Results 

Bibliometric Analysis	STS 2007	STS 2009

No. of Papers Analyzed	662	794

No. of Papers Cited At Least Once in a Journal	546 (82.5%)	723 (91.1%)

Highly Cited Publications (Top 10% Threshold)	187 (28.2%)	225 (28.3%)

Highly Cited Publications (Top 1% Threshold)	32 (4.8%)	35 (4.4%)

Highly Cited Publications (Top 0.1% Threshold)	6 (0.9%)	7 (1.0%)

Highly Cited Publications (Top 0.01% Threshold)	1 (0.15%)	1 (0.1%)

No. of Times Cited	12,887	18,684

Expected No. of Times Cited	5,134	8,029

Ratio of Actual Cited to Expected Cites	2.5	2.3

Papers in High Impact Journals by Impact Factor	227 (34.3%)	281 (35.4%)

Papers in High Impact Journals by Immediacy Index	 239 (36.1%)	275
(34.6%)

No. of Author Self Cites (%)	477 (3.7%)	658 (3.5%)

No. of Hot Papers (%)	8 (1.2%)	11 (1.4%)

No. of Authors in ISIHighlyCited.com	8 (0.9%)	13 (1.2%)

No. of Patents/Patent Applications	25/9	30/3