Patent thicketA patent thicket is "an overlapping set of patent rights" which requires innovators to reach licensing deals for multiple patents. This concept is associated with negative connotations and has been described as "a dense web of overlapping intellectual property rights that a company must hack its way through in order to actually commercialize new technology". The expression may come from SCM Corp. v. Xerox Corp., 645 F.2d 1195 (2d Cir.
Propensity score matchingIn the statistical analysis of observational data, propensity score matching (PSM) is a statistical matching technique that attempts to estimate the effect of a treatment, policy, or other intervention by accounting for the covariates that predict receiving the treatment. PSM attempts to reduce the bias due to confounding variables that could be found in an estimate of the treatment effect obtained from simply comparing outcomes among units that received the treatment versus those that did not. Paul R.
