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Multiplier Effect of Investment Spending quiz

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  • What is the multiplier effect in the context of investment spending?
    The multiplier effect refers to the chain reaction where an initial increase in investment spending leads to a greater total increase in economic output due to repeated rounds of spending.
  • How does an increase in investment spending affect household incomes?
    An increase in investment spending raises household incomes because firms hire more workers or pay higher wages, distributing more money to households.
  • What happens to household consumption when their income increases?
    Household consumption increases as their income rises, since people tend to spend a portion of any additional income they receive.
  • What is the marginal propensity to consume (MPC)?
    The marginal propensity to consume (MPC) is the fraction of additional income that households spend on consumption rather than saving.
  • How does the MPC affect the size of the multiplier?
    A higher MPC leads to a larger multiplier, meaning each round of spending is bigger and the total increase in GDP is greater.
  • What is the formula for the multiplier using MPC?
    The multiplier is calculated as 1 divided by (1 minus MPC), or 1/(1-MPC).
  • If the MPC is 0.75, what is the value of the multiplier?
    If MPC is 0.75, the multiplier is 1/(1-0.75) = 1/0.25 = 4.
  • How does the multiplier effect lead to a total increase in GDP greater than the initial investment?
    The multiplier effect causes each round of spending to generate more income and consumption, so the total increase in GDP is a multiple of the initial investment.
  • What is the relationship between MPC and MPS?
    MPC and MPS (marginal propensity to save) always add up to 1, so MPS = 1 - MPC.
  • How can the multiplier be expressed using MPS?
    The multiplier can also be written as 1 divided by MPS, or 1/MPS.
  • What happens to the multiplier if the MPC increases from 0.75 to 0.9?
    If MPC increases, the denominator (1-MPC) gets smaller, so the multiplier becomes larger, resulting in a bigger total increase in GDP.
  • What is the chain reaction described by the multiplier effect?
    The chain reaction is that increased investment leads to higher incomes, which leads to more consumption, which further increases incomes and spending in repeated rounds.
  • Why is understanding the multiplier effect important for fiscal policy?
    Understanding the multiplier effect helps policymakers predict how changes in government or investment spending will impact aggregate demand and overall economic output.
  • In the example where investment increases by \$5 billion and MPC is 0.75, what is the total increase in GDP?
    With a multiplier of 4, the total increase in GDP is \(5 billion x 4 = \)20 billion.
  • What mathematical concept allows the infinite series of spending rounds to be summed up in the multiplier formula?
    The infinite series of spending rounds is summed using the formula for a geometric series, resulting in the multiplier 1/(1-MPC).