出版社：Consejo Superior de Investigaciones Científicas
摘要：The advisory committee of the area of Economic and Management Sciences of the CNEAI values the journals that appear in the JCR on the basis of an aggregate index of impact that multiplies the Impact Factor by the Cited Half Life or Median of the citation age data of each journal. In the database JCR the cites older than 10 years are aggregated, therefore when these cites constitute more than 50% of the total we cannot calculate the median. The committee takes in these cases 9.9 as value for the median. We propose to obtain an estimation of it fitting previously a Weibull model in the presence of censored data. As a consequence, it is possible to value the journals with a very slow ageing more precisely.
关键词：impact factor;median;Weibull model;censored data;factor de impacto;mediana;modelo Weibull;datos censurados
