مقایسهٔ روش‌ها

	g-Index (Egghe)	Contemporary h-Index
حوزه	کتاب‌سنجی	کتاب‌سنجی
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	2006	2007
پدیدآور	Leo Egghe	Antonis Sidiropoulos, Dimitrios Katsaros & Yannis Manolopoulos
نوع	Author-level cumulative-citation impact index	Age-discounted author impact index
منبع بنیادین	Egghe, L. (2006). Theory and practise of the g-index. Scientometrics, 69(1), 131-152.	Sidiropoulos, A., Katsaros, D., & Manolopoulos, Y. (2007). Generalized Hirsch h-index for disclosing latent facts in citation networks. Scientometrics, 72(2), 253-280.
نام‌های دیگر	Egghe g-index, Egghe index, g index	hc-index, time-weighted h-index, age-decayed h-index
مرتبط	3	3
خلاصه	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.	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.