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MARGINAL PRODUCT CURVE: A curve that graphically illustrates the relation between marginal product and the quantity of the variable input, holding all other inputs fixed. This curve indicates the incremental change in output at each level of the variable input. The marginal product curve is one of three related curves used in the analysis of the short-run production of a firm. The other two are total product curve and average product curve. The marginal product curve plays in key role in the economic analysis of short-run production by a firm in large part because economists are generally obsessed with marginal changes in production.
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                           INFLATIONARY EXPECTATIONS, AGGREGATE EXPENDITURES DETERMINANT: One of several specific aggregate expenditures determinants assumed constant when the aggregate expenditures line is constructed, and that shifts the aggregate expenditures line when it changes. An increase in inflationary expectations causes an increase (upward shift) of the aggregate expenditures line. A decrease in inflationary expectations causes a decrease (downward shift) of the aggregate expenditures line. Other notable aggregate expenditures determinants include interest rates, federal deficit, consumer confidence, and exchange rates. Inflationary expectations are the expectations that consumers have concerning future inflation. Inflationary expectations work for aggregate expenditures much like buyers' expectations work for market demand. Buyers seek to purchase a good at the lowest possible price. - If buyers expect higher prices in the future, then they increase their demand in the present.
- If buyers expect lower prices in the future, then they decrease their demand in the present.
The relation that exists between price expectations and market demand also applies to inflationary expectations and consumption expenditures.- If consumers expect higher inflation in the future, then they increase consumption expenditures in the present.
- If consumers expect lower inflation in the future, then they decrease consumption expenditures in the present.
In each case, the household sector seek to buy goods at the lowest possible prices.A change in inflationary expectations, by changing consumption expenditures, induces changes in aggregate expenditures. An increase in inflationary expectations increases aggregate expenditures and causes an upward shift of the aggregate expenditures line. A decrease in inflationary expectations then decreases aggregate expenditures and causes a downward shift of the aggregate expenditures line. What It Does| Inflationary Expectations | 
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The exhibit to the right presents a standard Keynesian economics aggregate expenditures line. Like all aggregate expenditures lines, this one is constructed based on several ceteris paribus aggregate expenditures determinants, such as inflationary expectations. They key question is: What happens to this aggregate expenditures line if inflationary expectations changes?Expecting Higher InflationSuppose, for example, that the inflation rate has been running at a nice constant 2 percent for several years. Households have been able to include this 2 percent inflation rate into their assorted plans (attaining loans, negotiating wage increases, buying cars and houses). They count on 2 percent inflation. Now suppose that irresponsible monetary policy causes an increase in the inflation to 3 percent one year, then to 4 percent the next, the 5 percent the following year, each time catching the household sector, which had been expecting only 2 percent inflation, off guard.The household sector is bound to adjust. Rather than expecting 2 percent inflation, they adjust their expectations upward, perhaps to 5 percent, 6 percent, or even higher. As part of their adjustment, they decide to increase their consumption expenditures, especially for expensive durable goods, rather than waiting. If the price of a house is expected to be higher next year, they decide not to wait, but to buy now. The increase in inflationary expectations causes an increase in consumption expenditures and subsequently an increase aggregate expenditures. To see how a higher inflationary expectations affects the aggregate expenditures line, click the [Higher Expectations] button. The increase in inflationary expectations causes an increase in aggregate expenditures, which is a upward shift of the aggregate expenditures line. Expecting Lower InflationExpectations can, of course, work both ways. Suppose that after years of 5 percent inflation, the inflation rate is brought down to 4 percent, then 3 percent, then 2 percent. While the downward adjustment of inflationary expectations might take longer, the household sector is bound to adjust, eventually. When it does, the household sector is likely to postpone current consumption expenditures, awaiting lower inflation rates expected in the future. The decrease in inflationary expectations causes a decrease in consumption expenditures and subsequently a decrease aggregate expenditures.To see how lower inflationary expectations affects the aggregate expenditures line, click the [Lower Expectations] button. The decrease in inflationary expectations causes a decrease in aggregate expenditures, which is a downward shift of the aggregate expenditures line. What Does It Mean?The importance of the inflationary expectations as an aggregate expenditures determinant was revealed by high and rising inflation rates during the 1970s. Inflation rates continued to rise during this period in spite of contractionary fiscal policies in large part because the public "expected" inflation to rise. Once this relation was uncovered, manipulation of inflationary expectations was used during the 1980s, especially during the contraction of the early 1980s, to reduce inflation and to keep it low throughout the 1990s.
Recommended Citation:INFLATIONARY EXPECTATIONS, AGGREGATE EXPENDITURES DETERMINANT, AmosWEB Encyclonomic WEB*pedia, http://www.AmosWEB.com, AmosWEB LLC, 2000-2023. [Accessed: June 5, 2023].
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BLACK DISMALAPOD
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Today, you are likely to spend a great deal of time watching the shopping channel looking to buy either a computer that can play video games and burn DVDs or a black duffle bag with velcro closures. Be on the lookout for gnomes hiding in cypress trees.
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During the American Revolution, the price of corn rose 10,000 percent, the price of wheat 14,000 percent, the price of flour 15,000 percent, and the price of beef 33,000 percent.
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"It takes generosity to discover the whole through others. If you realize you are only a violin, you can open yourself up to the world by playing your role in the concert. " -- Jacques Yves Cousteau, marine explorer
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