A preliminary study of the relationship between the h-index and excess citations = Étude préliminaire de la relation entre lindice de Hirsch (indice-h) et les citations excédentaires
Faculty of Social Sciences. Instructional and Educational Sciences
North York, Ont.
Documentation and information
The Canadian journal of information and library science. - North York, Ont.
, p. 127-144
University of Antwerp
This article presents a study of the average number of excess citations of papers in the h-core, denoted as e(2)/h and the ratio between the e-area and the h-area, denoted as e(2)/h(2). Real-world citation data from different countries are studied. It is found that at the country level, a small set of publications generate a disproportionately large amount of citations. Although different countries have different e(2)/h(2) values in different fields, average e(2)/h(2) values are all above 1. The e(2)/h values vary widely between fields, reflecting the general citation density in these fields. For cumulative data e(2)/h(2) and e(2)/h values each converge quickly. Neither a shifted Zipf nor an exponential model could fit the data.