Competition and innovation

Which kind of intellectual property regime is more favorable to innovation: one that enforces patents or one that does not? Economic theory is unable to answer this question, as valid arguments can be made both for and against patents; hence we must turn to empirical evidence. In this paper, we review empirical evidence gathered by other researchers and add new evidence of our own. We conclude that the evidencesuggests that patents do not promote innovation, but instead retard it