//-->
Econometric Models for Count Data with an Application to the Patents-R&D Relationship
Hausman, Jerry A., (2021)
Hausman, Jerry A., (1984)
Count data stochastic frontier models, with an application to the patents-R&D relationship
Fé, Eduardo, (2013)
Characteristics of Demand for Pharmaceutical Products: An Examination of Four Cephalosporins
Fisher, Sara Ellison, (1997)
Econometric Models for Count Data with an Application to the Patents-R&D Relationship.
Hausman, Jerry, (1984)
Errors in variables in panel data
Griliches, Zvi, (1986)