# Aggregate expenditure model. Introducing Aggregate Expenditure 2019-02-02

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## The AE Model How can the multiplier be used to analyze the economic impact of professional sports? That is, we know that changes in disposable income lead to subsequent changes in consumption spending. The Aggregate Demand Curve shows the relationship between the price level and the level of planned aggregate expenditure in the economy, holding constant all other factors that affect aggregate expenditure. Use the information in this table to graph the aggregate expenditures line on one graph and the savings and investment schedules on another graph. Say that business confidence declines and investment falls off, or that the economy of a leading trading partner slows down so that export sales decline. It is a simple simulation of some aspect of the real world. In economic terms, it tells the additional amount of aggregate consumption that the members of the economy will desire to undertake, for each additional dollar of income they receive. The import function is drawn as downward sloping and negative, because it represents a subtraction from the aggregate expenditures in the domestic economy.

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## Aggregate Expenditure And Aggregate Demand Note that, over time, the long-run real interest rate will shift, because of changes in aggregate demand and changes in potential economic output. Instead, the aggregate expenditure and aggregate supply adjust each other toward equilibrium. Parents who purchase a college education for their children might base their decision on their own expected lifetime income. In the Lesson on Fiscal Policy, we will show how both government spending and taxes the two primary components of fiscal policy can be used to expand or contract the economy. How can we incorporate the concept of the multiplier into the model of aggregate demand and aggregate supply? Another issue rests with the use of aggregate data in macroeconomics. Learning to use a model requires getting used to some math, and it's tempting to feel that once you've figured out the math you're done learning the model.

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## AGGREGATE EXPENDITURE MODEL Lower real interest rates have the opposite effects. Autonomous and Induced Aggregate Expenditures Economists distinguish two types of expenditures. Taxes in the basic Keynesian cross diagram are taken into account by adjusting the consumption function. This includes expenditure on residential housing, buildings, equipment, etc. If output was above the equilibrium level, at H, then the real output is greater than the aggregate expenditure in the economy. Computation of the Multiplier The The number by which we multiply an initial change in aggregate demand to get the full amount of the shift in the aggregate demand curve.

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## Aggregate Expenditures Model Flashcards However, exports can shift up or down, depending on buying patterns in other countries. It has a certain amount of inventory that it wants to keep on hand at all times so as to be able to normal customer demand. This approach is strongly rooted in the fundamental assumptions of Keynesian economics. Finally, because more of them live locally, they will spend a higher proportion of their income on local goods—say, 65%. Government Spending and Taxes as a Function of National Income In the Keynesian cross diagram, government spending appears as a horizontal line, as in , where government spending is set at a level of 1,300. This is true because we have assumed that so many of our expenditure categories are autonomous. The aggregate expenditure is thus the sum total of all the expenditures undertaken in the economy by the factors during a given time period.

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## ECON 151: Macroeconomics When there is an excess of expenditure over supply, then there is excess demand which leads to an increase in prices out output. Congressional decisions to increase government spending will cause this horizontal line to shift up, while decisions to reduce spending would cause it to shift down. Lower real interest rates will lower large items such as vehicles and homes , and business capital project spending will increase — making the aggregate demand curve shift down and to the right. Thus, a higher level of imports means a lower level of expenditure on domestic goods. The Marginal Propensity to Consume and the Multiplier We can compute the multiplier for this simplified economy from the marginal propensity to consume.

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## Aggregate Expenditure And Aggregate Demand Output on the horizontal axis is conceptually the same as national income, since the value of all final output that is produced and sold must be income to someone, somewhere in the economy. Aggregate Expenditure: This graph shows the aggregate expenditure model. At a lower price level, aggregate expenditures would rise because of the wealth effect, the interest rate effect, and the international trade effect. Real values of disposable personal income and consumption per year from 1960 through 2008 are plotted in. A higher marginal propensity to save, a higher tax rate, and a higher marginal propensity to import will all make the slope of the aggregate expenditure function flatter—because out of any extra income, more is going to savings or taxes or imports and less to spending on domestic goods and services.

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## Aggregate Demand He believed the government could spend money and increase aggregate demand until idle economic resources, including laborers, were redeployed. The aggregate expenditure determines the total amount that firms and households plan to spend on goods and services at each level of income. That is we assume that some part of each extra dollar earned is saved. Before writing a consumption equation, we want to consider variable consumption expenditure a little more closely. In reality, investment expenditure varies with changes in interest rates and possibly incomes, but here we will assume this does not occur. The third column shows after-tax income; that is, total income minus taxes. A higher marginal propensity to consume means a steeper consumption function; a lower marginal propensity to consume means a flatter consumption function.

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## The Aggregate Expenditure Model The balanced-budget multiplier is equal to 1 and can be summarized as follows: when the government increases spending and taxes by the same amount, output will go up by that same amount. Both aggregate expenditure and aggregate demand take consumption, investment, government outlays, and net factor income from abroad as the basic components of economic demand. Addressing Recessionary and Inflationary Gaps. While the Council of Economic Advisers concluded that the tax cut had worked as advertised, it came long after the economy had recovered and tended to push the economy into an inflationary gap. The aggregate expenditures curve for a price level of 1.

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## Aggregate expenditure Any change in aggregate demand causes a change in income, and a change in income causes a change in consumption—which changes aggregate demand and thus income and thus consumption. A change in the marginal propensity to import, perhaps as a result of changes in preferences, would alter the slope of the import function. However, the increase in equilibrium output, shown on the horizontal axis, is clearly larger. Anything that shifts the aggregate expenditure line down is a potential cause of recession, including a decline in consumption, a rise in savings, a fall in investment, a drop in government spending or a rise in taxes, or a fall in exports or a rise in imports. The process continues, thus multiplying the impact of the reduction in aggregate expenditures resulting from the reduction in planned investment. Both factors reduce expenditures by reducing consumption and investments, and therefore, aggregate expenditure. As we receive more income, we desire more imported goods.

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## ECON 151: Macroeconomics The factors that determine consumption thus determine how successful an economy is in fulfilling its ultimate purpose: providing goods and services for people. Our assumption is that investors determine their level of investment in advance of the current period. In an under-employment equilibrium the Keynesian cross refers to the point of intersection of the aggregate supply and the aggregate expenditure curve. . Exactly how a situation of zero income and negative savings would work in practice is not important, because even low-income societies are not literally at zero income, so the point is hypothetical. Now, consider the impact of money spent at local entertainment venues other than professional sports. This relationship between income and consumption, illustrated in and , is called the consumption function.

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