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<span style="FONT-SIZE: 24pt; FONT-FAMILY: 宋体;"></span><span lang="EN-US" style="FONT-SIZE: 24pt;"><p><span style="FONT-SIZE: 22pt; FONT-FAMILY: 宋体;"></span><span lang="EN-US" style="FONT-SIZE: 22pt;"><p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span style="FONT-SIZE: 22pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">证明:如果两个厂商有向上倾斜的反应函数,从而</span><span lang="EN-US" style="FONT-SIZE: 22pt;"><font face="Times New Roman">f</font></span><span style="FONT-SIZE: 22pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体;">ˊ</span><sub><span lang="EN-US" style="FONT-SIZE: 22pt;"><font face="Times New Roman">i</font></span></sub><span style="FONT-SIZE: 22pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">(</span><span lang="EN-US" style="FONT-SIZE: 22pt;"><font face="Times New Roman">y<sub>i</sub></font></span><span lang="EN-US" style="FONT-SIZE: 22pt; FONT-FAMILY: 宋体;">)</span><span style="FONT-SIZE: 22pt; FONT-FAMILY: 宋体;">><span lang="EN-US">0,(y<sub>1</sub><sup>*</sup>,y<sub>2</sub><sup>*</sup>)</span>为斯塔伯格均衡,则<span lang="EN-US">f<sub>2</sub>(f<sub>1</sub>(y<sub>2</sub><sup>*</sup>))</span>><span lang="EN-US">f<sub>2</sub>(y<sub>1</sub><sup>*</sup>)=y<sub>2</sub><sup>*</sup></span>。</span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span style="FONT-SIZE: 22pt; FONT-FAMILY: 宋体;"></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span style="FONT-SIZE: 22pt; FONT-FAMILY: 宋体;">范里安《微观经济学(高级教程)》第三版331页16.5题。</span><span lang="EN-US" style="FONT-SIZE: 22pt;"><p></p></span></p></p></span></p></span>
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