Fw: [SIGMETRICS] Towards a new crown indicator: an empirical analysis

[T. van Raan]

Dear Colleagues,

To remove any misunderstanding concerning the point raised by Loet (see
below), the following short comment. In Eq. 1 of our paper the elements (i)
in the summation in the numerator obviously concern the same elements as in
the denomitator, by definition. The elements are the publications of any
kind of entity (e.g., group, institute, university, country). In the
numerator the number of citations received by each of the elements i are
totalled, and in the nominator we have the sum of the expected values of the
same elements i. So both summations concern exactly the same set, and thus
the total size of the summation is the same for the denominator and the
nominator, which is n.

Best regards,
Ton van Raan


----- Original Message ----- 
From: "Loet Leydesdorff" <loet at LEYDESDORFF.NET>
To: <SIGMETRICS at LISTSERV.UTK.EDU>
Sent: Friday, April 16, 2010 12:39 PM
Subject: Re: [SIGMETRICS] Towards a new crown indicator: an empirical
analysis


> Adminstrative info for SIGMETRICS (for example unsubscribe):
> http://web.utk.edu/~gwhitney/sigmetrics.html
>
> Dear Ton,
>
> I read the paper with interest.
>
> It seems to me that the value of n in the numerator and denominator of
> Equation 1 are different, aren't they? Would it then not be better to
> use different symbols, (fore example, m and n)?
>
> Perhaps, I misunderstand. In that case, please, clarify.
>
> Best wishes,
>
> Loet
>
>
> On Wed, Apr 14, 2010 at 2:29 PM, Anthony F.J. van Raan
> <vanraan at xs4all.nl> wrote:
>> Adminstrative info for SIGMETRICS (for example unsubscribe):
>> http://web.utk.edu/~gwhitney/sigmetrics.html
>>
>> Dear Colleagues, we have the following contribution to the discussion on
>> new bibliometric performance indicators: http://arxiv.org/abs/1004.1632v1
>> .
>>
>> Best wishes,
>> Ton van Raan
>>
>
>
>
> -- 
> Loet Leydesdorff
> Amsterdam School of Communications Research (ASCoR)
> Kloveniersburgwal 48, 1012 CX Amsterdam
> Tel.: +31-20- 525 6598; fax: +31-20- 525 3681
> loet at leydesdorff.net ; http://www.leydesdorff.net/
> ---------------------------------------
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