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Graphical Interpretation of the Marginal Propensity to Consume (MPC)
When the aggregate consumption function is plotted with income on the horizontal axis and consumption on the vertical axis, the marginal propensity to consume (MPC) corresponds to the slope of the consumption line. A steeper line indicates a higher MPC, signifying a larger consumption response to income changes. Conversely, a flatter line indicates a lower MPC, meaning consumption is less sensitive to income fluctuations.
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Ch.3 Aggregate demand and the multiplier model - The Economy 2.0 Macroeconomics @ CORE Econ
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Graphical Interpretation of the Marginal Propensity to Consume (MPC)
Assumption about the Range of the Marginal Propensity to Consume (MPC)
Example of a Marginal Propensity to Consume (MPC) of 0.6
An economy experiences a $200 billion increase in aggregate disposable income. As a result, aggregate consumption spending rises from $800 billion to $950 billion. Based on this information, what is the marginal propensity to consume (MPC) for this economy?
Two households, the Smith family and the Jones family, each receive an unexpected one-time bonus of $1,000. The Smith family's marginal propensity to consume is 0.9, while the Jones family's is 0.6. Which statement best analyzes the immediate effect of this bonus on their spending?
Economic Stimulus Policy Evaluation
A household earns a disposable income of $60,000 per year and spends $45,000 on consumption. Based on this information, the household's marginal propensity to consume is 0.75.
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An unexpected, one-time government payment is distributed to all citizens. Which of the following individuals is most likely to have the highest marginal propensity to consume with respect to this payment?
Evaluating Economic Stimulus Policies
Consider two economies, A and B, with the following aggregate consumption functions where C is consumption and Yd is disposable income (both in billions of dollars):
- Economy A: C = 200 + 0.8Yd
- Economy B: C = 500 + 0.5Yd
If both economies experience an identical $100 billion increase in aggregate disposable income, which statement accurately compares the resulting change in consumption?
An economic report observes that for every additional dollar of disposable income households receive, they tend to increase their savings by $0.25. Based on this information, what is the implied marginal propensity to consume (MPC)?
Formulating an Aggregate Consumption Function
Aggregate MPC as an Average
Determinants of the Marginal Propensity to Consume
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An economist plots the relationship between aggregate consumption (vertical axis) and aggregate income (horizontal axis) for two different countries, Country A and Country B. The resulting consumption line for Country A is steeper than the consumption line for Country B. What can be concluded from this graphical representation?
Economic Stimulus Policy Decision
Graphical Effect of a Change in Spending Behavior
An economist is analyzing consumption functions, which are graphed with aggregate consumption on the vertical axis and aggregate income on the horizontal axis. Match each graphical description of a consumption function to the correct interpretation of the Marginal Propensity to Consume (MPC).
An economic analyst observes that a country's aggregate consumption line, when plotted with consumption on the vertical axis and income on the horizontal axis, has become noticeably flatter over the last five years. Based solely on this graphical change, the analyst can correctly conclude that households are, on average, spending a smaller proportion of each new dollar of income they receive compared to five years ago.