微观经济学问题1、ProspectivesunkcostsA)arerelevanttoeconomicdecision-making.B)areconsideredasinvestmentdecisions.为什么选A而不是B2、In1985,Alicepaid$20,000foranoptiontopurchasetenacresofland.Bypayingthe$20,000

Question

微观经济学问题
1、Prospective sunk costs
A) are relevant to economic decision-making.
B) are considered as investment decisions.
为什么选A而不是B
2、In1985,Alice paid $20,000 for an option to purchase ten acres of land.By payingthe $20,000,she bought the right to buy the land for $100,000 in 1992.Whenshe acquired the option in 1985,the land was worth $120,000.In 1992,it isworth $110,000.Should Alice exercise the option and pay $100,000 for the land?
这题怎么理解
3、 FarmerJones bought his farm for $75,000 in 1975.Today the farm is worth $500,000,and the interest rate is 10 percent.ABC Corporation has offered to buy thefarm today for $500,000 and XYZ corporation has offered to buy the farm for$530,000 one year from now.Farmer Jones could earn net profit of $15,000 (overand above all of his expenses) if he farms the land this year.What should hedo?
那个interest rate用什么用呢~

Answer 1

我先来回答2、3两个问题,第一个问题因为我不知道sunk cost前面加perspective是什么意思,稍后再回答好了.
2、其实就是说A在1985购买了以100000购买标的的期权,花费20000,这20000已经是沉没成本,在1992,A以标示价购买后能赚取10000,所以仍需要行使期权.
3、利率是用来比较三种不同的收益方式下折算时间后的收益,也就是说把收益折算成一年来比较大小.