Abstract
The author has for years been developing statistical indexes on the number of papers and citations for universities and institutes based on the citation index databases of Thomson Reuters (ISI). Recently, there appear some discussions that the disparities among universities have been widened due to the competition encouraging policies by the government after the incorporatization of the national universities in 2004. The author has already publicized the trend of widened disparities between the top 8 national universities and the others up to 2006 in a newspaper article, "Local universities: Threatened research foundations" in The Yomiuri Shimbun. In the present paper, annual developments of the disparities are investigated in detail with the updated data of 2007 and indexes including the HHI: Herfindahl-Hirschman Index on citations as well as the number of papers, in order to get some idea on the future picture.
