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If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. EconomicsAP®︎/College MacroeconomicsNational income and price determinationChanges in the AD-AS model in the short run Lesson summary: Changes in the AD-AS model in the short runIn this lesson summary review and remind yourself of the key terms and graphs related to changes in the AD-AS model. Topics include AD shocks, such as changes in consumption, investment, government spending, or net exports, and supply shocks such as price surprises that impact SRAS, and how changes in either of these impact output, unemployment, and the price level. Monthly Plan
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journal article Inventories and Sticky Prices: More on the Microfoundations of MacroeconomicsThe American Economic Review Vol. 72, No. 3 (Jun., 1982) , pp. 334-348 (15 pages) Published By: American Economic Association https://www.jstor.org/stable/1831536 Read and download Log in through your school or library Alternate access options For independent researchers Subscribe to JPASS Unlimited reading + 10 downloads Purchase article $10.00 - Download now and later Journal Information The American Economic Review is a general-interest economics journal. Established in 1911, the AER is among the nation's oldest and most respected scholarly journals in the economics profession and is celebrating over 100 years of publishing. The journal publishes 11 issues containing articles on a broad range of topics. Publisher Information Once composed primarily of college and university professors in economics, the American Economic Association (AEA) now attracts 20,000+ members from academe, business, government, and consulting groups within diverse disciplines from multi-cultural backgrounds. All are professionals or graduate-level students dedicated to economics research and teaching. Rights & Usage This item is part of a JSTOR Collection. A sudden and temporary increase or decrease in the demand for a good or a bundle of goods What is a Demand Shock?A demand shock is a sudden and temporary increase or decrease in the demand for a good or a bundle of goods. Usually, the phrase “demand shock” is used in the context of aggregate demand, which describes the cumulative demand for an entire economy. Summary
A Shift in DemandA temporary change in demand can be caused by any factor that:
Many factors allow consumers to consume more (such as a universal tax cut that allows consumers to receive more to spend) and many factors that induce consumers to consume more (such as warmer weather increasing the demand for cold drinks during the summer months). Graphically, a demand shock is shown as a shift of the entire demand curve. Equivalently, we can say that the shock causes the quantity demanded to increase or decrease at any given price. Change in Price Cannot Cause a Demand ShockA movement along the demand curve reflects a change in quantity demanded due to a change in price and is not a demand shock. In the graph above, there is a change in quantity demanded due to a change in price. Thus, this graph does not reflect a demand shock. We can see that as price changes, quantity demanded changes, but the demand curve does not shift. Duration of Demand Shock EffectsThe duration of the effects of demand shocks can vary greatly. Although the effects are described as “temporary,” there are no rigorous guidelines as to how “temporary” is defined. Instead, “temporarily” is used to present the notion that the economy is in an irregular state and that aggregate demand is different from what economists consider standard. Depending on the context of the demand shock, effects can range from a few days to several years. Example of a Short-Term Temporary Decrease in DemandA short, temporary decrease in demand lasting a few days can be a food product recall that renders consumers wary of buying the aforementioned products. If the food safety authorities can recall all faulty products quickly, the public will start consuming that product at its regular level again within a few days. Example of a Long-Term Temporary Decrease in DemandA long, temporary decrease in demand can be caused by a factor, such as a disease pandemic. In such a case, most economic activity is suspended until an approved vaccine is available. However, medical professionals may take years to find an effective vaccine, and consequently, the resumption of regular economic activity may be delayed for several years. Positive and Negative Demand ShocksA demand shock can either temporarily increase or decrease demand. Graphically, the entire demand curve would shift left or shift right, respectively. Positive Demand ShocksPositive demand shocks cause aggregate demand to increase. As shown below, the entire demand curve shifts right. We see that, at any price, the quantity demanded’s increased. There can be many factors that can lead to a positive demand shock. Some of them include:
Negative Demand ShocksNegative demand shocks cause aggregate demand to decrease. As shown below, the entire demand curve shifts left. We see that, at any price, the quantity demanded’s decreased. There can be many factors that can lead to a negative demand shock. Some of them include:
Effects of Demand Shocks on Prices and QuantityWhen analyzing demand shocks, it is important to analyze two aspects of the economy.
The conventional method of analysis is to keep the supply of goods constant to see the pure effect of the demand shock. Such a technique works with either a specific good (e.g., pencils) or a basket of goods (i.e., household products). We will demonstrate the analysis below, assuming normal goods are being analyzed. Positive Demand ShocksWhen the supply is kept constant and demand increases, we expect the quantity supplied and consumed and the price of the transactions to increase. Specifically, the rationales are as follows:
Graphically, we can see that the price increases from P0 to P1, and quantity supplied and demanded increases from Q0 to Q1. Negative Demand ShocksAnalogous to the previous section, when demand is shocked to decrease (while supply is kept constant), we expect both the quantity supplied and consumed, as well as the price of the transactions to decrease. The rationales are as follows:
Graphically, we can see that the price decreases from P0 to P1, and quantity supplied and demanded decreases from Q0 to Q1. More ResourcesCFI is the official provider of the Commercial Banking & Credit Analyst (CBCA)™ certification program, designed to transform anyone into a world-class financial analyst. In order to help you become a world-class financial analyst and advance your career to your fullest potential, these additional resources will be very helpful:
What happens when a negative demand shock occurs?Negative demand shocks decrease aggregate demand in the economy because people are more inclined to save rather than consume. When a negative demand shock occurs, governments try to counter this by introducing a positive demand shock.
How do you deal with demand shocks?Policies to deal with economic shocks include. Monetary policy – to reduce inflation or boost economic growth.. Fiscal policy – higher government borrowing to finance higher government spending.. Devaluation – reduce the value of the currency to boost exports.. Supply-side policies.. What happens in the economy in response to a negative supply shock?A supply shock is an unexpected event that changes the supply of a product or commodity, resulting in a sudden change in price. A positive supply shock increases output, causing prices to decrease, while a negative supply shock decreases output, causing prices to increase.
What impact will a negative demand shock have on the main measures of economic performance?Negative shocks decrease output and increase unemployment. Positive shocks increase production and reduce unemployment. The effect on inflation, however, will depend on whether the shock was a supply shock or a demand shock.
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