[Sigmetrics] Quality versus quantity in scientific impact

Gopal T V gopal at annauniv.edu
Thu Sep 10 23:27:57 EDT 2015

Dear Dr. Filippo Menczer,

Thank you for sharing your paper titled:

Quality versus quantity in scientific impact

How are the traditional metrics varying close to the nominations for the
Nobel Prize and soon after the winners are declared ?

For example:

-3 years to +3 years with respect to the date of declaration of the winners

I eagerly await your advise.

Warmest Regards

Gopal T V
0 98401 21302
Dr. T V Gopal
Department of Computer Science and Engineering
College of Engineering
Anna University
Chennai - 600 025, INDIA
Ph : (Off) 22351723 Extn. 3340
      (Res) 24454753
Home Page : http://www.annauniv.edu/staff/gopal

On Wed, September 2, 2015 7:45 pm, Fil Menczer wrote:
> [Apologies for cross-posting]
> The sigmetrics community may be interested in our new paper on
> scholarly quality versus quantity. Is a scientist's apparent impact as
> measured by citation metrics due to high quality or just publishing in
> large quantity (minimum publication unit, salami publishing,
> self-plagiarism, etc)? What is the impact needed to assess excellence
> given one's number of publication?
> Quality versus quantity in scientific impact
> by Jasleen Kaur, Emilio Ferrara, Filippo Menczer, Alessandro Flammini,
> Filippo Radicchi
> Journal of Informetrics 9(4): 800–808, October 2015.
> doi:10.1016/j.joi.2015.07.008
> Free access at http://authors.elsevier.com/a/1Re9e6EAijZsXu
> Abstract: Citation metrics are becoming pervasive in the quantitative
> evaluation of scholars, journals, and institutions. Hiring, promotion,
> and funding decisions increasingly rely on a variety of impact metrics
> that cannot disentangle quality from quantity of scientific output,
> and are biased by factors such as discipline and academic age. Biases
> affecting the evaluation of single papers are compounded when one
> aggregates citation-based metrics across an entire publication record.
> It is not trivial to compare the quality of two scholars that during
> their careers have published at different rates, in different
> disciplines, and in different periods of time. Here we evaluate a
> method based on the generation of a statistical baseline specifically
> tailored on the academic profile of each researcher. We demonstrate
> the effectiveness of the approach in decoupling the roles of quantity
> and quality of publications to explain how a certain level of impact
> is achieved. The method can be extended to simultaneously suppress any
> source of bias. As an illustration, we use it to capture the quality
> of the work of Nobel laureates irrespective of number of publications,
> academic age, and discipline, even when traditional metrics indicate
> low impact in absolute terms. The procedure is flexible enough to
> allow for the evaluation of, and fair comparison among, arbitrary
> collections of papers – scholar publication records, journals, and
> institutions; in fact, it extends a similar technique that was
> previously applied to the ranking of research units and countries in
> specific disciplines (Crespo, Ortuño-Ortí, & Ruiz-Castillo, 2012). We
> further apply the methodology to almost a million scholars and over
> six thousand journals to measure the impact that cannot be explained
> by the volume of publications alone.
> Filippo Menczer
> Professor of Informatics and Computer Science
> Director, Center for Complex Networks and Systems Research
> Indiana University, Bloomington
> http://cnets.indiana.edu/people/filippo-menczer
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