西方经济学 高鸿业主编 第章 课后习题答案.docVIP

西方经济学 高鸿业主编 第13章 课后习题答案 In the two sectors of the economy, equilibrium occurs in (C). A. actual savings equal actual investment; B. Real consumption plus real investment equals output. C. planned savings = planned investment; Total investment is equal to the income of the enterprise. When the consumption function is c = a + by (a , 0, 0, 0 b 1), this indicates the average propensity to consume (a). A. greater than marginal propensity to consume; B. That is equal to the marginal propensity to consume; D. All three possibilities are possible. If the marginal propensity to save is 0.3, investment spending increases by 6 billion yuan, which will lead to an increase in equilibrium income (D). A. 2 billion yuan; B. 6 billion yuan; C. 18 billion yuan; D. 20 billion yuan. At the equilibrium level of output, is it necessary to plan inventory investment and non-planned inventory investment to be zero? Solution: when it is at equilibrium level of output, it is usually not zero to plan inventory investment, not to plan to invest in inventory. This is because the plan is part of the project investment, inventory investment and output equilibrium output is equal to the consumer plans to invest, so the plan is not necessarily zero inventory. When the planned inventory increases, the inventory investment is greater than zero; Inventory investment is less than zero when the planned inventory is reduced. It should be noted that inventory is stock, inventory investment is flow, inventory investment is the change of inventory. On the equilibrium level of output, inventory investment is part of the project investment plan, it is not zero, but the program must have zero inventory investment, if not plan inventory investment is not zero, that is not the equilibrium output. For example, companies miscalculated the situation, producing more than the market needed, creating a non-planned inventory investment. Can you say that the marginal propensity to consume and the average propensity to