Corstjens, Marcel; Demeire, Edouard; Horowitz, Ira - In: Economics of Innovation and New Technology 14 (2005) 4, pp. 319-331
Using quarterly data for 56 new ethical-drug products launched between 1989 and 1996, we estimate the coefficients of a regression equation that has cumulative future sales beyond the forecast period as its dependent variable and third-quarter sales, post-launch product improvements and...
