IDEAS/RePEc Simple Impact Factors for Journals is a list containing a simple impact factor for journals covering primarily economics. It is calculated from the ratio of the number of citations to the number of articles in a series. The number of citations is adjusted to exclude citations from the same series. These calculations are experimental and based on the citation analysis of the CitEc project, which uses data from articles listed in RePEc. Only series or journals with 50 or more articles are considered in the ranking.