拥有互补性专利的双寡头厂商可以进行三种方式的专利交易，分别是无专利授权、交叉许可授权和专利联盟授权。
Two duopoly firms with the perfect complementary patents may conduct three types of patent transaction, they are no patent licensing, cross licensing, patent pools licensing respectively.
在无专利竞赛下，通过对不同市场结构下企业R& D动力的比较，本文认为竞争性市场结构有利于激励企业的技术创新。
The view that competitive market structure is most helpful to motivate R&D is verified by this paper by comparing different market structures without R&D rivalry.
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