Yöntem Karşılaştırma

	m-Quotient (Hirsch m)	Contemporary h-Index	g-Index (Egghe)
Alan	Bibliyometri	Bibliyometri	Bibliyometri
Aile	Process / pipeline	Process / pipeline	Process / pipeline
Köken yılı	2005	2007	2006
Köken	Jorge E. Hirsch	Antonis Sidiropoulos, Dimitrios Katsaros & Yannis Manolopoulos	Leo Egghe
Tür	Career-length-normalized author impact rate	Age-discounted author impact index	Author-level cumulative-citation impact index
Seminal kaynak	Hirsch, J. E. (2005). An index to quantify an individual's scientific research output. Proceedings of the National Academy of Sciences, 102(46), 16569-16572.	Sidiropoulos, A., Katsaros, D., & Manolopoulos, Y. (2007). Generalized Hirsch h-index for disclosing latent facts in citation networks. Scientometrics, 72(2), 253-280.	Egghe, L. (2006). Theory and practise of the g-index. Scientometrics, 69(1), 131-152.
Diğer adlar	Hirsch m-quotient, m-parameter, h-index per year	hc-index, time-weighted h-index, age-decayed h-index	Egghe g-index, Egghe index, g index
İlişkili	3	3	3
Özet	The m-quotient, defined by Jorge Hirsch in the same 2005 paper that introduced the h-index, normalizes an author's h-index by the length of their scientific career. Because the h-index can only grow over time and never decreases, raw h-values systematically favor senior researchers and make it unfair to compare early-career scientists with established ones. The m-quotient divides the h-index by the number of years since the researcher's first publication, yielding a rate of impact accumulation per year. Hirsch proposed rough benchmarks on this scale, suggesting that a sustained value near 1 characterizes a successful scientist, near 2 an outstanding one, and near 3 a truly exceptional figure, making the m-quotient a tool for comparing researchers at different career stages.	The contemporary h-index, introduced by Sidiropoulos, Katsaros, and Manolopoulos in 2007, modifies Hirsch's h-index to reward recent scientific activity over old laurels. The plain h-index never decreases and treats a citation earned decades ago the same as one earned last year, so a researcher who has stopped publishing can coast on an aging body of work. The contemporary index assigns each paper an age-discounted score, multiplying its citation count by a factor that shrinks as the paper grows older, and then applies the usual h-index ranking criterion to these scores. The result distinguishes currently active, recently impactful researchers from those whose reputation rests on distant achievements.	The g-index, introduced by Leo Egghe in 2006, is an author-level bibliometric indicator designed to repair a structural weakness of Hirsch's h-index: its insensitivity to the size of the most-cited papers. Where the h-index caps the credit any single paper can earn at h, the g-index lets exceptionally cited articles raise an author's score. It is defined as the largest number g such that the g most-cited papers together accumulate at least g-squared citations. Because it rests on cumulative rather than per-paper citation counts, the g-index always equals or exceeds the h-index and rewards researchers whose impact is concentrated in a few landmark works as well as those with broad, steady output.