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研究所、轉學考(插大)-經濟學
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99年 - 99 淡江大學 轉學考 經濟學#55908
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題組內容
The market shares in the U.S. airline industry for 1998 are shown in Table2.
a.Calculate the four-firm concentration ratio.
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d.Sketch the marginal-revenue and marginal-cost curves.
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b.Calculate the six-firm concentration ratio.
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c.In 1998, several airlines proposed “code-sharing” agreements that would allow cooperation on schedules. Under these, American would be combined with U.S. Airways, United would combine with Delta, and Northwest would join with Continental. Calculate the four-firm concentration ratio under the agreement.
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d.Calculate the Herfindahl-Hirschman Index (HHI) before and after the code-sharing agreements. For this calculation, assume that the balance of industry revenues are shared among 8 firms.
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In Japan in 1998 and 1999, prices were falling at 2 percent per year while the short-term interest rate was 0.1 percent per year.a.What was the real interest rate?
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(a) 2549 is divided by 11
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