Openness agreements led to a burst of novel research
Average rates of new keywords in citations for a sample of articles about genetically engineered mice published in 1992-94. Most articles see declining rates of new keywords over time as new citations tend to cover similar ground as old citations. The Cre-lox and Onco articles were given second life when access to mice created with these methods improved in the late '90s. New keywords proliferated as research went in new directions.