Griffith, Rachel (contributor); Harrison, Rupert (contributor) - 2004 - [Elektronische Ressource]
patents
applied for between 1975 and 1989 where the lead inventor is located in the USA.
20
We construct the equivalent for … the firm’s patents where: (1) the inventor is located
in the USA and (2) the patent cites at least one other patent whose … W
US
i
is thus equal to the proportion
of the firm’s total patents where: (1) the inventor is located in the USA and (2 …