Hall, Bronwyn H.; Griliches, Zvi; Hausman, Jerry A. - 2021
This paper extends earlier work on the RID to patents relationship (Pakes-Griliches 1980, and Hausman, Hall, and … lag structure on R&D in the absence of a sufficient history of the variable, we take two approaches: first, we use the … conditional version of the negative binomial model, and second, we estimate the R&D variable itself as a low order stochastic …