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The spreadsheet lists real GDP $(Y)$ and the components of aggregate planned expenditure in billions of dollars. $$\begin{array}{|c|c|c|c|c|c|c|c|} \hline & \mathrm{A} & \mathrm{B} & \mathrm{C} & \mathrm{D} & \mathrm{E} & \mathrm{F} & \mathrm{G} \\ \hline 1 & & \mathrm{Y} & \mathrm{C} & 1 & \mathrm{G} & \mathrm{X} & \mathrm{M} \\ \hline 2 & \mathrm{A} & 100 & 110 & 50 & 60 & 60 & 15 \\ \hline 3 & \mathrm{B} & 200 & 170 & 50 & 60 & 60 & 30 \\ \hline \mathbf{4} & \mathrm{C} & 300 & 230 & 50 & 60 & 60 & 45 \\ \hline 5 & \mathrm{D} & 400 & 290 & 50 & 60 & 60 & 60 \\ \hline 6 & E & 500 & 350 & 50 & 60 & 60 & 75 \\ \hline 7 & F & 600 & 410 & 50 & 60 & 60 & 90 \\ \hline \end{array}$$ Calculate autonomous expenditure. Calculate the marginal propensity to consume. 

   The spreadsheet lists real GDP $(Y)$ and the components of aggregate planned expenditure in billions of dollars.
$$\begin{array}{|c|c|c|c|c|c|c|c|}
\hline & \mathrm{A} & \mathrm{B} & \mathrm{C} & \mathrm{D} & \mathrm{E} & \mathrm{F} & \mathrm{G} \\
\hline 1 & & \mathrm{Y} & \mathrm{C} & 1 & \mathrm{G} & \mathrm{X} & \mathrm{M} \\
\hline 2 & \mathrm{A} & 100 & 110 & 50 & 60 & 60 & 15 \\
\hline 3 & \mathrm{B} & 200 & 170 & 50 & 60 & 60 & 30 \\
\hline \mathbf{4} & \mathrm{C} & 300 & 230 & 50 & 60 & 60 & 45 \\
\hline 5 & \mathrm{D} & 400 & 290 & 50 & 60 & 60 & 60 \\
\hline 6 & E & 500 & 350 & 50 & 60 & 60 & 75 \\
\hline 7 & F & 600 & 410 & 50 & 60 & 60 & 90 \\
\hline
\end{array}$$
Calculate autonomous expenditure. Calculate the marginal propensity to consume.
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Economics
Economics
Michael Parkin 12th Edition
Chapter 28, Problem 20 ↓

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Autonomous expenditure is the sum of consumption, investment, government spending, and net exports when income is zero. In this case, we can see that the autonomous expenditure is the sum of C, I, G, and (X-M) when Y is zero. However, in the given table, the  Show more…

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The spreadsheet lists real GDP $(Y)$ and the components of aggregate planned expenditure in billions of dollars. $$\begin{array}{|c|c|c|c|c|c|c|c|} \hline & \mathrm{A} & \mathrm{B} & \mathrm{C} & \mathrm{D} & \mathrm{E} & \mathrm{F} & \mathrm{G} \\ \hline 1 & & \mathrm{Y} & \mathrm{C} & 1 & \mathrm{G} & \mathrm{X} & \mathrm{M} \\ \hline 2 & \mathrm{A} & 100 & 110 & 50 & 60 & 60 & 15 \\ \hline 3 & \mathrm{B} & 200 & 170 & 50 & 60 & 60 & 30 \\ \hline \mathbf{4} & \mathrm{C} & 300 & 230 & 50 & 60 & 60 & 45 \\ \hline 5 & \mathrm{D} & 400 & 290 & 50 & 60 & 60 & 60 \\ \hline 6 & E & 500 & 350 & 50 & 60 & 60 & 75 \\ \hline 7 & F & 600 & 410 & 50 & 60 & 60 & 90 \\ \hline \end{array}$$ Calculate autonomous expenditure. Calculate the marginal propensity to consume.
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Key Concepts

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Marginal Propensity to Consume
The marginal propensity to consume (MPC) is a key concept in macroeconomics that measures the change in consumption that results from a change in disposable income. Essentially, it quantifies the proportion of additional income that households will spend on consumption rather than save. This measure is crucial for understanding the multiplier effect and predicting how changes in income will affect overall economic activity, enabling economists to evaluate fiscal policy impacts and consumption smoothing behavior across different income levels.
Autonomous Expenditure
Autonomous expenditure refers to the portion of total spending in an economy that does not depend on the level of aggregate income. It includes items such as government spending, fixed investment, and other components that are exogenously determined. In models of aggregate demand, autonomous expenditure is the base level of demand from which changes in income begin to have an effect, serving as an important parameter in understanding the behavior of the economy, particularly when analyzing shifts in spending and their multiplier effects.
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