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金启元 · 2024年01月13日

Marginal propensity to consume是怎么计算的，为什么不是0.65， 而是0.65/0.72

  1. CFA I
  2. Economics Analysis

NO.PZ2023071902000016

问题如下：

QuestionIn a theoretical economic model, consumer spending is 65% of pre-tax revenue, and the average taxation rate is 28% of the overall revenue. If forecasted government expenditures are projected to rise by $1.5 billion, by what amount, in billions, will the total revenue and expenditure likely increase?

选项：

A.$2.8. B.$4.3. C.$1.1.

解释：

Solution

  1. Correct.

    The fiscal multiplier is 1 1−c( 1−T ) where

    c = marginal propensity to consume = consumption/disposable income

    T = the tax rate

    Assuming pre-tax income of $1

    Disposable income: $1× (1 – 0.28) = $0.72

    Marginal propensity to consume: $0.65/$0.72 = 0.9028

    The fiscal multiplier: 1/[1 – 0.9028(1 – 0.28)] = 2.8571

    With an increase in government expenditures of $1.5 billion, total revenues and expenditures will ascend by $1.5billion × 2.8571 ≈ $4.3 billion

Fiscal Policy

• describe tools of fiscal policy, including their advantages and disadvantages

Marginal propensity to consume是怎么计算的，为什么不是0.65， 而是0.65/0.72

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1 个答案

笛子_品职助教 · 2024年01月14日

嗨，努力学习的PZer你好：


Hello，亲爱的同学~

Marginal propensity to consume

= 消费/税后收入

= 0.65/0.72

----------------------------------------------
虽然现在很辛苦，但努力过的感觉真的很好，加油！

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