咖啡巧克力 · 2024年04月19日
NO.PZ2023071902000093
问题如下：
Question Inflation rates rise by 1.4% in the US and by 4.6% in the Eurozone. If
the nominal spot exchange rate for the USD/EUR falls by 3%, the precise shift in the real exchange rate is
nearest to:
选项：
A.0%.
B.5%.
C.9%.
解释：
Solution
The adjustment in the real exchange rate can be formulated as:
（1-3%）*（1+4.6%）/(1+1.4%) -1 =0.000611≈0
•
实际汇率的调整可表示为:
(1-3%)*(1+4.6%)/(1+1.4%) -1 =0.000611≈0
可以用变化率直接计算吗？
-3%+4.6%-1.4%=0.002？
笛子_品职助教 · 2024年04月19日
嗨，爱思考的PZer你好：
Hello，亲爱的同学~
本题解析里的（1-3%）*（1+4.6%）/(1+1.4%) -1 =0.000611≈0是精确公式。
同学给出的-3%+4.6%-1.4%=0.002，是近似公式。
两个公式都正确，都可用。
原版书正文给了精确公式，但例题用的近似公式。
有时候，这两个公式的计算结果会有一定差异。
建议考试的时候，首选精确公式，跟着原版书正文走，而不是例题走，更稳妥一些。
精确也总是比近似要稳妥。
----------------------------------------------努力的时光都是限量版，加油！
NO.PZ2023071902000093问题如下 Question Inflation rates rise 1.4% in the US an4.6% in the Eurozone. If the nominspot exchange rate for the USEUR falls 3%, the precise shift in the reexchange rate is nearest to: A.0%.B.5%.C.9%. Solution The austment in the reexchange rate cformulateas: （1-3%）*（1+4.6%）/(1+1.4%) -1 =0.000611≈0The Foreign Exchange Market anCapitFlows• 实际汇率的调整可表示为:(1-3%)*(1+4.6%)/(1+1.4%) -1 =0.000611≈0 看不懂推导，麻烦一下
NO.PZ2023071902000093 问题如下 Question Inflation rates rise 1.4% in the US an4.6% in the Eurozone. If the nominspot exchange rate for the USEUR falls 3%, the precise shift in the reexchange rate is nearest to: A.0%. B.5%. C.9%. Solution The austment in the reexchange rate cformulateas: （1-3%）*（1+4.6%）/(1+1.4%) -1 =0.000611≈0The Foreign Exchange Market anCapitFlows• 实际汇率的调整可表示为:(1-3%)*(1+4.6%)/(1+1.4%) -1 =0.000611≈0 公式为什么前面是1-3%后面还要减去1
NO.PZ2023071902000093问题如下 Question Inflation rates rise 1.4% in the US an4.6% in the Eurozone. If the nominspot exchange rate for the USEUR falls 3%, the precise shift in the reexchange rate is nearest to: A.0%.B.5%.C.9%. Solution The austment in the reexchange rate cformulateas: (1-3%)(1+1.4%)/(1+4.6%)≈0The Foreign Exchange Market anCapitFlows• 解題的算式得出0.94 為什麼答案會是0
