Why do Universities Rankings have Such Different Lists?

University rankings feature lists of higher education institutions ranked by item and weight. As they are available in the internet, can be consulted anyone wishing to find best universities: students who want enter education, teachers researchers looking for new positions governments/investors fund best. The easy consult everyone. There different classifications which published: some global, subdivided areas, others only one country. results very from each other because follow systems. Many have a huge number Asian (mainly Chinese) universities top while consist mostly American universities. This article compares computer science that appear analyzes criteria creating these rankings. Our goal is understand why there so many differences favor type investigation. direct relationship between massive presence total dependence on WebOfScience publications. same not true when data source Scopus database.