Purpose: Many people in developing countries are suffering from serious diseases, such as HIV and tuberculosis. On the other hand, drug patents impact the availability of the drug for patients. Pharmaceutical technology transfer is widely used by domestic and foreign pharmaceutical enterprises...

Abstract Count data regressions are an important tool for empirical analyses ranging from analyses of patent counts to measures of health and unemployment. Along with negative binomial, Poisson panel regressions are a preferred method of analysis because the Poisson conditional fixed effects...