The research on equilibrium in R&D investment of firms based on foreign competitive firm and product differentiation
Keyword(s):
2012 ◽
Vol 14
(3)
◽
pp. 111-136
◽
2020 ◽
Vol 15
(2)
◽
pp. 253-280
2019 ◽
Vol 22
(4)
◽
pp. 503-525