<p class="MsoNormal"><font face="맑은 고딕"><b><span lang="en-us">Consider the following demand and supply relationships in the market for golf balls: <i>Q<sup>d</sup></i></span></b><b><span lang="en-us">= </span></b><b><span lang="en-us">90 </span></b><b><span lang="en-us">− </span></b><b><span lang="en-us">2<i>P </i></span></b><b><span lang="en-us">− </span></b><b><span lang="en-us">2<i>T </i>and <i>Q<sup>s</sup></i></span></b><b><span lang="en-us">= −</span></b><b><span lang="en-us">9 </span></b><b><span lang="en-us">+ </span></b><b><span lang="en-us">5<i>P </i></span></b><b><span lang="en-us">− </span></b><b><span lang="en-us">2<i>.</i>5<i>R</i>, where <i>T </i>is the price of titanium, a metal used to make golf clubs, and <i>R </i>is the price of rubber.</span></b></font></p><p><b></b></p><b></b> <p class="MsoNormal"><font face="맑은 고딕"><b><span lang="en-us">a) If <i>R </i></span></b><b><span lang="en-us">= </span></b><b><span lang="en-us">2 and <i>T </i></span></b><b><span lang="en-us">= </span></b><b><span lang="en-us">10, calculate the equilibrium price and quantity of golf balls.</span></b><b><span lang="en-us"></span></b></font></p><p><b></b></p><b></b> <p class="MsoNormal"><font face="맑은 고딕"><b><span lang="en-us">b) At the equilibrium values, calculate the price elasticity of demand and the price elasticity of supply.</span></b><b><span lang="en-us"></span></b></font></p><p><b></b></p><b></b> <p class="MsoNormal"><font face="맑은 고딕"><br></font></p> <p class="MsoNormal"><font face="맑은 고딕">a는</font></p> <p class="MsoNormal" style="text-indent:40pt;"><span lang="en-us"><font face="맑은 고딕">90-2P-20 = -9+5P-5</font></span></p><p></p> <p class="MsoNormal" style="text-indent:40pt;"><span lang="en-us"><font face="맑은 고딕">70-2P = -14+5P</font></span></p><p></p> <p class="MsoNormal" style="text-indent:40pt;"><span lang="en-us"><font face="맑은 고딕">84 = 7P</font></span></p><p></p> <p class="MsoNormal" style="text-indent:40pt;"><span lang="en-us"><font face="맑은 고딕">P = 12</font></span></p><p></p> <p class="MsoNormal"> </p> <p class="MsoNormal" style="text-indent:40pt;"><span lang="en-us"><font face="맑은 고딕">Q = 90-24-20 = 46</font></span></p> <p class="MsoNormal"><font face="맑은 고딕">b는 </font></p> <p class="MsoNormal"><font face="맑은 고딕">수요의 가격 탄력성<span lang="en-us"> : -2 * 12 / 46 = - 0.52</span></font></p><p></p> <p class="MsoNormal"><span lang="en-us"><font face="맑은 고딕">그렇다면 공급의 가격 탄력성은 어떻게 구하죠????</font></span></p>
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