双寡头垄断指市场份额全部或绝大部分由两家供应商掌控的垄断现象。 双寡头之间虽然也有竞争，但同样存在客户或消费者被动接受过高定价和低质服务的现象。双寡头垄断实例有：AMD和Intel，Nvidia和ATI等等。从鼓励竞争的长期趋势来看，双寡头垄断势必会瓦解，市场上会出现新的供应商来形成充分竞争。
成本不对称条件下双寡头R&D合作行为分析_OK期刊网-论文发表指导|期刊真伪辨别 关键词:技术创新;双寡头垄断;R&D合作 [gap=909]Key words: technological innovation; dual oligopoly; R & D cooperation
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双寡头垄断政策 duopoly policy
Finally,the merger timing of firms in the case of monopoly and duopoly is derived via actual examples,and the possible equilibriums of firm's timing games in the case of duopoly are discussed.
最后,通过具体的实例计算得出了完全垄断情况下和双寡头垄断情况下兼并企业的最优兼并时机,并探讨了双寡头垄断情况下兼并企业之间时机博弈可能形成的均衡。
参考来源 - 双寡头兼并目标企业的兼并时机研究·2,447,543篇论文数据，部分数据来源于NoteExpress
第一种情况是美元的全球垄断地位，将让位于美元和欧元的双寡头垄断。
The first is that the dollar's global monopoly will give way to a duopoly of the dollar and the euro.
预计届时中国成品油市场将以双寡头垄断的市场结构为主要特征。
It is expected that by then Chinese product oil market will be characterized by market structure of two oligarchs monopoly.
在这种双寡头垄断的局面下，中国联通尚不能赢得满意的市场份额。
Although under the situation of double oligarch monopolization, China Unicom is not able to win the satisfactory market share.
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