Preprint Impact Study

Demographic and Citation Trends in Astrophysical Journal papers and Preprints is a study of "the publishing, preprint posting, and citation patterns for papers published in the ApJ in 1999 and 2002" which concludes that, on average, "ApJ papers posted on astro-ph are cited more than twice as often as those that are not posted on astro-ph" and offers "insights into how astronomical research is currently disseminated by authors and ingested by readers."