Abstract The economics of science, and thus the subject of what has come to be known as “open science,” is omnipresent in Paul David’s work. Throughout his writings, David has never ceased to return to it, enriching it with new contributions. Better still, with the emergence of the Internet—whose importance is asserting itself at a time when the evolution of Intellectual Property law was threatening the “scientific commons” themselves—David renewed and enriched his approach by examining the oppo