UC Santa Cruz placed 11th on the annual Leiden Ranking, which measures the scientific performance of 500 major universities worldwide.
The 2013 Leiden Ranking from the Center for Science and Technology Studies of Leiden University is based on data from the Web of Science bibliographic database produced by Thomson Reuters. The annual ranking aims to provide accurate measurements of the scientific impact of universities and of universities' involvement in scientific collaboration. Scientific impact is determined by several indicators, including the average number of citations of the publications of a university and the proportion of the publications of a university that, compared with other publications in the same field and in the same year, belong in the top 10 percent of the most frequently cited papers.
UCSC has received high rankings in a number of different analyses that look at the same kinds of data using different methodologies. For example, UCSC ranked second for research influence in the Times Higher Education (THE) World University Rankings 2012-13, published last year.
The 2013 Leiden Ranking is based on Web of Science indexed publications from the period 2008–2011. It includes the 500 universities worldwide with the largest publication output in the Web of Science database.
Other UC campuses on the list include UC Santa Barbara (ranked 2nd), UC Berkeley (7th), UCSF (9th), UC San Diego (15th), and UCLA (25th).