[Sigmetrics] The One-Percent Club For Top-Cited Papers

[Loet Leydesdorff]

Dear colleagues:

I apologize: this was formulated too hastily. It should be:

There is no a priori reason to focus on the top-1%, top-10%, or any 
other percentile class. One can use the quantile values of all papers in 
a journal and then integrate using Σixi * n(xi), where xidenotes the 
quantile value i, and n the number of papers with this value.
A paper in the top-1% group then has a value of 99+ and a median paper 
will count as 50. See my paper: “Alternatives to the journal impact 
factor: I3 and the top-10% (or top-25%?) of the most-highly cited 
papers.” Scientometrics, 92(2), 355-365. We elaborated this for journals 
in: Leydesdorff, L., & Bornmann, L. (2012). “Percentile Ranks and the 
Integrated Impact Indicator (I3).” Journal of the American Society for 
Information Science and Technology, 63(9), 1901-1902.

Best,
Loet

--------------------------------------------------------------------------------
Loet Leydesdorff

Professor, University of Amsterdam
Amsterdam School of Communication Research (ASCoR)

loet at leydesdorff.net <mailto:loet at leydesdorff.net>; 
http://www.leydesdorff.net/
Associate Faculty, SPRU, <http://www.sussex.ac.uk/spru/>University of 
Sussex;

Guest Professor Zhejiang Univ. <http://www.zju.edu.cn/english/>, 
Hangzhou; Visiting Professor, ISTIC, 
<http://www.istic.ac.cn/Eng/brief_en.html>Beijing;

Visiting Fellow, Birkbeck <http://www.bbk.ac.uk/>, University of London;

http://scholar.google.com/citations?user=ych9gNYAAAAJ&hl=en


------ Original Message ------
From: "Loet Leydesdorff" <loet at leydesdorff.net>
To: "Philip Davis" <pmd8 at cornell.edu>; sigmetrics at mail.asis.org
Sent: 7/31/2017 7:59:51 PM
Subject: Re: [Sigmetrics] The One-Percent Club For Top-Cited Papers

>Dear Philip:
>
>There is no a priori reason to focus on the top-1%, top-10%, or any 
>other percentile class. One can use the quantile values (Q) of all 
>papers (xi) in a journal and then integrate using Σixi * Q(xi). A paper 
>in the top-1% group then has a value of 99+ and a median paper will 
>count as 50. See my paper: “Alternatives to the journal impact factor: 
>I3 and the top-10% (or top-25%?) of the most-highly cited papers.” 
>Scientometrics, 92(2), 355-365. We elaborated this for journals in: 
>Leydesdorff, L., & Bornmann, L. (2012). “Percentile Ranks and the 
>Integrated Impact Indicator (I3).” Journal of the American Society for 
>Information Science and Technology, 63(9), 1901-1902.
>
>Best,
>Loet
>
>--------------------------------------------------------------------------------
>Loet Leydesdorff
>
>Professor, University of Amsterdam
>Amsterdam School of Communication Research (ASCoR)
>
>loet at leydesdorff.net <mailto:loet at leydesdorff.net>; 
>http://www.leydesdorff.net/
>Associate Faculty, SPRU, <http://www.sussex.ac.uk/spru/>University of 
>Sussex;
>
>Guest Professor Zhejiang Univ. <http://www.zju.edu.cn/english/>, 
>Hangzhou; Visiting Professor, ISTIC, 
><http://www.istic.ac.cn/Eng/brief_en.html>Beijing;
>
>Visiting Fellow, Birkbeck <http://www.bbk.ac.uk/>, University of 
>London;
>
>http://scholar.google.com/citations?user=ych9gNYAAAAJ&hl=en
>
>
>------ Original Message ------
>From: "Philip Davis" <pmd8 at cornell.edu>
>To: sigmetrics at mail.asis.org
>Sent: 7/31/2017 4:35:14 PM
>Subject: [Sigmetrics] The One-Percent Club For Top-Cited Papers
>
>>An alternative to the Journal Impact Factor, Nature editors propose an 
>>index that measures highly cited papers.
>>
>>https://scholarlykitchen.sspnet.org/2017/07/31/one-percent-club/
>>
>>
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