中级微观经济学第1次作业

1.共5道题，满分10分；

2.仅有一次作答机会，提交后不可修改；截止时间（deadline）：9月25日23:00

3.请正确填写姓名和学号，需要用作查询成绩和答案。

姓名

____________

学号

____________

Teresa spends her entire budget and consumes 6 units of x and 20 units of y. The price of x is twice the price of y. Her income doubles and the price of y doubles, but the price of x stays the same. If she continues to buy 20 units of y; what is the largest number of units of x that she can afford?

A.12

B.6

C.14

D.16

Teresa thrives on two goods: mangos and melons. The cost of mangos is 30 yen each and the cost of melons is 15 yen each. If her income is 180 yen, how many mangos can she buy if she spends all of her income on mangos?

A.4

B.6

C.12

D.9

Heidi consumes goods x and y. Her indifference curves are described by the formula y =k/(x + 6). Higher values of k correspond to better indifference curves. Which of the following is true?

A. Heidi likes good y and hates good x.

B. Heidi prefers bundle (10,15) to bundle (15,10).

C. Heidi prefers bundle (9, 8) to bundle (8, 9).

D. Heidi likes good x and hates good y.

Mac's utility function is U (x,y) = max(2x-y , 2y-x)

A. Mac's preferences are quasi-linear.

B. If Mac has more x than y, any increase in his consumption of y would lower his utility.

C. If Mac has more x than y, a decrease in his consumption of y would raise his utility.

D. Mac always prefers more of each good to less.

Janet consumes x1 and x2 together in fixed proportions. She always consumes 2 units of x1 for every unit x2. One utility function that describes her preferences is:

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