Theory and practise of the g-index
@article{Egghe2006TheoryAP, title={Theory and practise of the g-index}, author={Leo Egghe}, journal={Scientometrics}, year={2006}, volume={69}, pages={131-152} }
The g-index is introduced as an improvement of the h-index of Hirsch to measure the global citation performance of a set of articles. If this set is ranked in decreasing order of the number of citations that they received, the g-index is the (unique) largest number such that the top g articles received (together) at least g 2 citations. We prove the unique existence of g for any set of articles and we have that g ≥ h. The general Lotkaian theory of the g-index is presented and we show that g…
1,549 Citations
An improvement of the h-index: the g-index
- Mathematics
- 2006
For a set of papers, ranked in decreasing order of the number of citations that they received, the h-index is the (unique) highest number of papers that received h or more citations. In the…
Revisiting the g-index: The average number of citations in the g-core
- Computer ScienceJ. Assoc. Inf. Sci. Technol.
- 2010
The Hirsch index h is defined as the highest number of papers of a scientist that received h or more citations, and the A-index, introduced as a measure for the citation intensity in the h-core, reflects this conjunction.
Relationship of the h-index, g-index, and e-index
- Mathematics
- 2010
Based on an alternative definition without introducing fictitious articles, an analytical method has been proposed to calculate the g-index based approximately on the h-index and the e-index, and if citations for a scientist are ranked by a power law, it is shown that theg-index can be calculated accurately by the h-, g-, and e- Index.
Modelling successive h-indices
- MathematicsScientometrics
- 2007
A model for such successive h-indices based on the existing theory on the distribution of the h- index in Lotkaian informetrics is presented and it is shown that, each step, involves the multiplication of the exponent of the previous h-index by 1/α where α > 1 is a Lotka exponent.
Distributions of the h-index and the g-index
- Mathematics
- 2007
In every scientific research area, each scientist has a unique h-index and g-index. This paper addresses the problem of determining the distribution of these indexes over the scientists. We apply…
The πv-index: a new indicator to characterize the impact of journals
- EconomicsScientometrics
- 2010
For determining the eminence of scientific journals, a new indicator stressing the importance of papers in the “elite set” (i.e., highly cited papers) is suggested, using the πv-index which is field and time dependent and closely correlated with the citedness (C/P) of Pπv papers.
What does the g-index really measure?
- EconomicsJ. Assoc. Inf. Sci. Technol.
- 2011
It is concluded that the h-index is a better bibliometric tool than is the g-index, and that the square root of the total number of citations is a convenient measure of a researcher's overall impact.
A bibliometric index based on the complete list of cited publications
- Computer ScienceArXiv
- 2013
The j-index is intended to complement rather than necessarily replace the h-index and other bibliometric indicators, thus providing a more complete picture of a researcher’s achievements.
REFLECTIONS ON THE H-INDEX
- Economics
- 2012
Since Hirsch’s first publication of the h-index in 2005 (Hirsch, 2005), this new measure of academic impact has generated a widespread interest. At the time of writing (January 2007) Google Scholar…
References
SHOWING 1-10 OF 17 REFERENCES
An improvement of the h-index: the g-index
- Mathematics
- 2006
For a set of papers, ranked in decreasing order of the number of citations that they received, the h-index is the (unique) highest number of papers that received h or more citations. In the…
Dynamic h-index: The Hirsch index in function of time
- MathematicsJ. Assoc. Inf. Sci. Technol.
- 2007
The time dependence of the /7-index is determined and it is shown that h is a concavely increasing function of time, asymptotically bounded by T1 ∞.
An informetric model for the Hirsch-index
- BusinessScientometrics
- 2006
It is shown that in each practical situation an IPP always has a unique h-index, which is based on the total number of items in Lotkaian systems.
H-Index for Price Medalists
- Medicine
- 2005
A look at the h-index of all still active Price Medal awardees, which is an extremely simple and compre-hensible indicator that is based on quite long publication periods and variable citationwindows, and it is predestined for purpose indeed.
Introduction to Informetrics: Quantitative Methods in Library, Documentation and Information Science
- Computer Science
- 1990
This chapter discusses informetric models, the dual approach between sources and items giving rise to the definition of Information Production Processes, and some science policy applications.
On the h-index - A mathematical approach to a new measure of publication activity and citation impact
- Mathematics, Computer ScienceScientometrics
- 2006
L'index-h, fonde sur le nombre de citations recues, mesure l'activite de publication and l'impact en citations, c'est un indicateur utile avec d'interessantes proprietes mathematiques, mais qui ne saurait se substituer aux indicateurs bibliometriques courants plus sophistiques.
A Hirsch-type index for journals
- BiologyScientometrics
- 2006
SummaryWe suggest that a h-type index - equal to h if you have published h papers, each of which has at least h citations - would be a useful supplement to journal impact factors.
Power Laws in the Information Production Process: Lotkaian Informetrics
- Computer Science
- 2005
This book discusses Lotkaian Informetrics of Systems in which Items can have Multiple Sources and Construction of Fractional Size-Frequency Functions Based on Two Dual Lotka laws.
An index to quantify an individual's scientific research output
- EconomicsProc. Natl. Acad. Sci. USA
- 2005
I propose the index h, defined as the number of papers with citation number ≥h, as a useful index to characterize the scientific output of a researcher.