TY - GEN
T1 - Evaluating and ranking patents using weighted citations
AU - Oh, Sooyoung
AU - Lei, Zhen
AU - Mitra, Prasenjit
AU - Yen, John
PY - 2012
Y1 - 2012
N2 - Citation counts have been widely used in a digital library for purposes such as ranking scientific publications and evaluating patents. This paper demonstrates that distinguishing different types of citations could rank better for these purposes. We differentiate patent citations along two dimensions (assignees and technologies) into four types, and propose a weighted citation approach for assessing and ranking patents. We investigate five weight learning methods and compare their performance. Our weighted citation method performs consistently better than simple citation counts, in terms of rank correlations with patent renewal status. The estimated weights on different citations are consistent with economic insights on patent citations. Our study points to an interesting and promising research line on patent citation and network analysis that has not been explored.
AB - Citation counts have been widely used in a digital library for purposes such as ranking scientific publications and evaluating patents. This paper demonstrates that distinguishing different types of citations could rank better for these purposes. We differentiate patent citations along two dimensions (assignees and technologies) into four types, and propose a weighted citation approach for assessing and ranking patents. We investigate five weight learning methods and compare their performance. Our weighted citation method performs consistently better than simple citation counts, in terms of rank correlations with patent renewal status. The estimated weights on different citations are consistent with economic insights on patent citations. Our study points to an interesting and promising research line on patent citation and network analysis that has not been explored.
UR - http://www.scopus.com/inward/record.url?scp=84863541648&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84863541648&partnerID=8YFLogxK
U2 - 10.1145/2232817.2232870
DO - 10.1145/2232817.2232870
M3 - Conference contribution
AN - SCOPUS:84863541648
SN - 9781450311540
T3 - Proceedings of the ACM/IEEE Joint Conference on Digital Libraries
SP - 281
EP - 284
BT - JCDL '12 - Proceedings of the 12th ACM/IEEE-CS Joint Conference on Digital Libraries
T2 - 12th ACM/IEEE-CS Joint Conference on Digital Libraries, JCDL '12
Y2 - 10 June 2012 through 14 June 2012
ER -