A.4

B.6

C.2

D.8

正确答案：4

10、Mike consumes two commodities， x and y； and his utility function is min{x +2y，y+2x}.He chooses to buy 8 units of good x and 16 units of good y.The price of good y is 0.50.What is his income？

A.32

B.40

C.24

D.16

正确答案：16

第四章单元测试

1、The strong axiom of revealed preference requires that if a consumer chooses x when he can afford y； and chooses y when he can afford z； then he will not choose z when he can afford x.。

A.正确

B.错误

正确答案：正确

2、If a consumer maximizes a utility function subject to a budget constraint and has strictly convex preferences， then his behavior will necessarily satisfy the weak axiom of revealed preference and the strong axiom of revealed preference.。

A.正确

B.错误

正确答案：正确

3、The Laspeyres price index differs from the Paasche price index because the Laspeyres index holds prices constant and varies quantities while the Paasche price index holds quantities constant and varies prices.。

A.正确

B.错误

正确答案：错误

4、Let A stand for the bundle（7，9）；B stand for the bundle（10，5）； and C stand for the bundle（6，6）.When prices are（2，4）； Betty chooses C.When prices are（12，3） she chooses A.Which of the following is true？

A.A is directly revealed preferred to B.

B.A is indirectly revealed preferred to B.

C.C；is directly revealed preferred to A.

D.None of the above

正确答案：None of the above

5、Remember that the Laspeyres price index uses the old quantities for the weights.In 1971， good x cost 3 and good y cost 1.The current price of good x is 3 and the current price of good y is 5.In 1971 the consumption bundle was（x，y） =（3，5）.The current consumption bundle is（x，y） =（9 ，4）.The Laspeyres index of current prices relative to 1971 prices is closest to which of the following numbers？

A.3.36

B.2.43

C.0.30

D.1.52

正确答案：2.43

6、It follows from the weak axiom of revealed preference that if a consumer chooses x when he could afford y and chooses y when he could afford x； then his income must have changed between the two observations.。

A.正确

B.错误

正确答案：错误

7、Let A stand for the bundle（7，9）；B stand for the bundle（10，5）； and C stand for the bundle（6，6）.When prices are（2，4）； Betty chooses C.When prices are（12，3） she chooses A.Which of the following is true？