We use dynamic panel data regressions to investigate whether the strength of a country’s patent protection for pharmaceuticals is associated with more pharmaceutical patenting by its residents and corporations in the United States. Using the Pharmaceutical Intellectual Property Protection (PIPP) Index to measure patent strength, we run dynamic probit and Poisson regressions on panels from 25 developing and 41 developed countries over the 1970-2004 period. Results vary, depending on whether we examine partial effects at the mean or average partial effects for the PIPP Index. APEs for the PIPP Index are positive but statistically insignificant in both developed and developing country samples.
