Back to the past: on the shoulders of an academic search engine giant

A study released by the Google Scholar team found an apparently increasing fraction of citations to old articles from studies published in the last 24 years (1990–2013). To demonstrate this finding we conducted a complementary study using a different data source (Journal Citation Reports), metric (aggregate cited half-life), time spam (2003–2013), and set of categories (53 Social Science subject categories and 167 Science subject categories)....