Jaffe, A.B.; Trajtenberg, M.: Patents, citations and innovations : a window on the knowledge economy (2002)
0.01
0.014760386 = product of:
0.029520772 = sum of:
0.029520772 = product of:
0.059041545 = sum of:
0.059041545 = weight(_text_:c in 6231) [ClassicSimilarity], result of:
0.059041545 = score(doc=6231,freq=2.0), product of:
0.1291003 = queryWeight, product of:
3.4494052 = idf(docFreq=3817, maxDocs=44218)
0.037426826 = queryNorm
0.45733082 = fieldWeight in 6231, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.4494052 = idf(docFreq=3817, maxDocs=44218)
0.09375 = fieldNorm(doc=6231)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Footnote
- Rez. in: JASIST 54(2003) no.8, S.802-803 (C. Chen)
