老师您好。提问经济——example6中，第5问。“以下哪个策略未提高人均GDP？” A.策略一：降低了国家税率 B：策略二：实行了鼓励高知移民者回流的政策 C:策略三：建立日托看护中心，允许更多的妇女劳动力参与进来。 为什么不选C呀？A降低了税率，刺激了投资，提高了资本流入和GDP；C增加了劳动力人数，降低了人均GDP

为什么portfolio的麦考利久期和market value weighted duration不一样？portfolio的久期不是single bond的久期加权平均计算的吗？

reading30课后题13的A，计算FCFE的时候，固定资产投资为啥减掉的是38而不是38-34=4的部分，资产负债表不是累积值吗

这个Fv是不是110？

cash flow matching 应该是eliminate而不是mitigate the risk from non-parallel shifts in the yield curve 吧？

01.单选题 已收藏 标记 纠错 If Brazil and South Africa have free trade with each other, a common trade policy against all other countries, but no free movement of factors of production between them, then Brazil and South Africa are part of a: A customs union. B free trade area (FTA). C common market. 查看解析 下一题 正确答案A 您的答案A本题平均正确率：76% Trading blocs, common markets and economic unions难度：一般 推荐：      答案解析 A customs union extends a free trade area (FTA) by not only allowing free movement of goods and services among members, but also creating common trade policy against non-members. Unlike a more integrated common market, a customs union does not allow free movement of factors of production among members. 问：能否用中文简单解释一下？无解析

08.单选题 已收藏 标记 纠错 Supposing that a country has a persistent trade surplus and is being pressured to let its currency appreciate. If currency appreciation is to be effective in reducing the trade surplus, which of the following best describes the adjustment that must occur? A Domestic investment must decline relative to saving. B Global capital flows must shift toward the domestic market. C Foreigners must increase investment relative to saving. 查看解析 上一题 下一题 正确答案B 您的答案A本题平均正确率：55% The balance of payments accounts难度：一般 推荐：      答案解析 The trade surplus cannot decline unless the capital account deficit also declines. Regardless of the mix of assets bought and sold, foreigners must buy more assets from (or sell fewer assets to) domestic issuers/investors. 问：请问如公式，B选项是公式中的哪一项，是X或者M吗？B选项中文是什么，怎么理解？

09.单选题 已收藏 标记 纠错 If a country has a trade deficit, which of the following is correct regarding to its other account? A Save enough to fund its investment spending. B Have an offsetting capital account surplus. C Buy assets from foreigners to fund the imbalance. 查看解析 上一题 下一题 正确答案B 您的答案A本题平均正确率：65% The balance of payments accounts难度：一般 推荐：      答案解析 A trade deficit must be exactly matched by an offsetting capital account surplus to fund the deficit. A capital account surplus reflects borrowing from foreigners (an increase in domestic liabilities) and/or selling assets to foreigners (a decrease in domestic assets). A capital account surplus is often referred to as a "capital inflow" because the net effect is foreign investment in the domestic economy. 问：紫色框框中 的部分 为什么没有考虑capital account？？不是总共有三个账户吗？

06.单选题 已收藏 标记 纠错 If a country having a current account deficit, which of the following is most likely to consume more output than it produces? A restricting foreign direct investment. B increasing its net foreign liabilities. C adjusting interest rates to stimulate higher domestic savings. 查看解析 上一题 下一题 正确答案B 您的答案A本题平均正确率：48% The balance of payments accounts难度：一般 推荐：      答案解析 A current account deficit must be offset by a capital account surplus. Only by borrowing money from foreigners can a country have a current account deficit and consume more output than it produces. An increase in net foreign liabilities is the result of borrowing from foreigners. 问：此题为啥 capital account 是surplus的？

问：请问这里边的两个小点 翻译成中文分别是什么意思？他们的（+）（-）关系又是什么样的?