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Patents, R&D and lag effects : evidence from flexible methods for count panel data on manufacturing firms
Gurmu, Shiferaw, (2008)
The role of anti-spying acts on R&D patents dynamics
Schettino, Francesco, (2007)
Gurmu, Shiferaw, (2007)
Patents and R and D at the Firm Level : A First Look
Pakes, Ariel, (2022)
The Value of Patents as Indicators of Inventive Activity
Pakes, Ariel, (2021)
Estimating distribution lags in short panels with an application to the specification of depreciation patterns and capital stock constructs
Pakes, Ariel, (1983)