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.
Source: author-provided data from Murray et al. (2016)