18.19.20题，谢谢老师

第五题

这两页ppt里的两个概念（Risk exposure&Value at risk）混淆了，感觉是一个意思啊。都是讲可能会收到风险影响的资产的value。请老师帮忙辨析一下吧

老师，您好。我对这道题有疑问。该题问的是和哪项风险最相关？我认为首先是违约风险，其次才是流动性风险。不过该题没有违约风险这一选项。

f(x) 与 F(x) 横纵坐标分别表示什么？

What is the most important effect of labor productivity in a cost-push inflation scenario? A.Rising productivity indicates a strong economy and a bias towards inflation. B.The productivity level determines the economy’s status relative to its “natural rate of unemployment.” C.As productivity growth proportionately exceeds wage increases, product price increases are less likely 这题为什么不选A 而选C呢？

If companies earn economic profits in a perfectly competitive market, over the long run the supply curve will most likely: A. shift to the left. B. shift to the right. C. remain unchanged. 按照老师讲的 LR 的 Economic profits 不是应该消失，只能获得normal profit，而且LRS不应该是一条垂直于X轴的线吗？

The demand schedule in a perfectly competitive market is given by P = 93 – 1.5Q (for Q ≤ 62) and the long-run cost structure of each company is: Total cost: 256 + 2Q + 4Q2 Average cost: 256/Q + 2 + 4Q Marginal cost: 2 + 8Q New companies will enter the market at any price greater than: A. 8. B. 66. C. 81. Perfect competition market 的条件不应该是 P=AR=MR=MC=AC 吗？ 那我直接用P=MC求出来Q，按道理说不也能得出答案吗？ 但是答案为什么不一样啊？

请老师讲解一下21题 看答案好像是本币贬值了 但是看题目不太理解为什么 currency升值为什么不是造成本币升值呢

If the price elasticity coefficient of the demand curve for paper clips is equal to –1, demand is: A. elastic. B. inelastic. C. unit elastic 为什么这题选C啊？