Aggregate Demand and Aggregate Supply
Aggregate Demand
Aggregate demand is the total amount of goods and services demanded in the economy at a given general price level and in a specified time period. The aggregate demand curve defines the link between price levels and the quantity of output that firms are eager to deliver. There is usually a negative link between aggregate demand and the price level, which is known as total spending. In other word aggregate demand is the total spending on goods and services made in the economy, which involves consumer spending, investment, government spending and net exports. (AD = C+I+G+(X-M)
Aggregate Supply
Aggregate supply is total amount of goods and services, which is the real output produced and supplied by an economy’s firms over a period of time. It contains the supply of a number of different types of goods and services including counted with consumer, capital, public and merit goods and other goods for overseas markets.
1.1 Explain equilibrium level of prices and real output with reference of a diagram
Equilibrium level of prices and real output
The equilibrium level of national output is the joining of the aggregate demand and aggregate supply curves.
Equilibrium output in the short-run
Both the Keynesian and classical economists approve that in the short run the aggregate demand curve is downward sloping whilst the aggregate supply is upward sloping. The equilibrium level of output in the short run only happens at the meeting point of the aggregate demand and aggregate supply curves. Whenever there is a rise in aggregate demand, it tends to shift the curve to the right. Aggregate demand involves, consumption, investment, government spending and export minus imports. So when the...
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...he future, then there is chance that they will end up seeing it in the present time.
Effect on the UK price level & real output level of rise in oil prices
(Aggregate supply diagram)
Higher oil prices would increase the cost of production and cause the short run aggregate supply curve to shift to the left. The rise in oil prices has caused an increase in the variable costs of firms for whom oil is a vital input into the making process. Because of that reason, businesses may be pursuing to raise their prices to keep their profit margins safe. This will end up causing demand to reduce and if the rise in oil costs has an effect on adequate businesses across the economy, hence the real national output will lead to a decrease. A supply-side shock such as this has a very high inflation effect on the overall price level but a depression effect on real output.
But as we know, there is always going to be one or the other. The reason that an economy is thrown out of equilibrium in the first place is a result of consumer spending habits. If these habits are changed, there is a result is one of two things. If consumers increase there spending habits, an inflationary gap occurs. At the opposite end of the spectrum, if consumers were to reduce their spending, the result is a recessionary gap. Inflation occurs when the economy is growing uncontrollably fast as a result of consumer spending. This rapid rate of inflation happens when consumers are spending money due to increases in income. When consumers spend more, this increases the overall price level, which therefore leads to a further increase in income. This cycle is what leads to over-inflation. One of two things can be done when an economy is experiencing an economic gap, whether it is above or below the trend line. Option one is to do nothing about it and let the problem work itself out. The problem with this method is that in order for a recession to work itself out without government assistance, this requires that workers take pay cuts – something that a very low percentage of people are accepting of simply due to the personal
There are a couple reasons why the aggregate-demand curve slopes downward. The first is the wealth effect. If the prices are higher, the money one has is worth less. It can be put into perspective by looking at it on a microeconomic level. For example, if you have a $20 bill, and the price for a ham sandwich rises from $5 to $10, you can only buy two sandwiches, rather than four. This shows that lower wealth leads to lower consumption, lower consumption leads to lower production, which means less workers will be need, leading to layoffs. The second reason is the interest-rate effect. As the prices rise, so do the interest rates. Higher interest rates hold down thing...
Brent crude, the main international benchmark, was trading around $48 a barrel. The American benchmark was at around $45 a barrel (Clifford Krauss). Regular gas nationally now averages around $2.65 a gallon, compared to $3.45 a year ago. Now the law of demand states consumers will buy more of the product if the price falls; of course when gas was at it's lowest peak everyone was driving around with there a/c on. They would use gasoline more often since it was not hurting their pockets as much. Now there is some instances where other goods and services can drop from gasoline prices. This can include a lawn mowing services and automotive business.
In 2004, crude oil producers around the world expected a 1.5% growth in the world’s demand for crude oil. The actual growth rate was more than double the projections at 3.3%. This growth was due to rapidly industrializing of foreign countries such as, China and India. Therefore the lack of crude oil affected the supply of gasoline to consumers at the pump.
For the Canadian citizens, it is a good thing because low cost of oil equals low price for gas, therefore the people of this country will have extra money in their pockets: “typical consumers will be saving an average of $25 a week, or $300 in three months” says Elna Cain in her article titled Why Are Gas Prices Low And What Does It Mean For Canadians. That being said, other businesses can benefit from the extra amount of cash. In other words, the beneficiaries of this decline in oil prices are not only the citizens, but other business owners as well. The reason why oil prices fluctuate is because of the law of supply and demand, which states that if the supply is low then the price will be high and if the demand is low then the price will be significantly low, which is the case for gas today.
Classical economists believe that these are “temporary” changes that will correct themselves in the long run. They feel that an economy will always tend towards operating at its potential output as given by the long-run aggregate supply curve. Nothing needs to be done by the government because normal market forces will serve to self-correct these issues. On the other hand, Keynesian economics argue that the gap between the lower and the potential levels of output is due to a change in aggregate demand. They argue that this gap can exist for a long time and that the gap can be pushed to close faster if the government enacts fiscal and monetary policies.
“Microeconomics and macroeconomics can be described in terms of small-scale vs. large-scale or in terms of partial vs. general equilibrium. Perhaps the most important distinction, however, is in terms of the role of equilibrium. While issues in microeconomics seldom challenge the notion of a naturally occurring equilibrium, the existence of business cycles and, especially, unemployment suggests too many observers that macroeconomics raises issues of a different character.” (McConnell & Brue, 2004).
In 1970 oil reserves became more scarce, leading to a decrease in production, while consumption continued to grow rapidly (Wright, R. T., & Boorse, D. F. 2011). In order to fill the gap between rising demand and falling supply of oil, the United States became more and more dependent on imported oil, primarily from Arab countries in the Middle East. (Wright, R. T., & Boorse, D. F. 2011). As the U.S and many other countries became highly industrialized nations, they became even more dependent on oil imports. With demand being higher than the actual amount of supply, prices kept rising reaching a peak of $140 a barrel in 2008. (Wright, R. T., & Boorse, D. F. 2011).
The law of demand states that if everything remains constant (ceteris paribus) when the price is high the lower the quantity demanded. A demand curve displays quantity demanded as the independent variable (the x-axis) and the price as the dependent variable (the y-axis). http://www.netmba.com/econ/micro/demand/curve/
Another key cause to the price inflation issue is the extended period of bitterly cold weather that loomed in the northern and midwestern parts of the U.S. throughout the winter months. This led to an “increased demand in home heating oil, which is widely used in the region and is virtually identical to diesel fuel” (Lang1). This increased demand for fuel coupled with the restrictions on exported oil allowed OPEC to jack up their prices an exorbitant amount in a relatively short period of time.
Second, inflation prices are going up, because of the gas prices high it effected everything a round from goods and services. Goods and services depend on gas for transportation and moving the goods from place to another. Services are going up due to higher cost of the gas. People are cutting back in the necessity like food, health insurance, and shopping. Many people have steady income and cannot effort much higher cost of anything.
In contrast, the Keynesian Economic Theory was presented in the 1930's, during the Great Depression, by a man named John Maynard Keynes (Classical vs. Keynesian). It relies on spending and aggregate demand which makes this theory demand driven. These economists believe that aggregate demand is influenced by public and private decisions. The public means the government, and the private means individuals and businesses. Aggregate demand sometimes affects production, employment, and inflation. When the economy starts to slack, they rely on the government to build it back up.
In an economy, aggregate demand (AD) accounts for the total expenditure on goods and services. It has five constituents; Consumer expenditure (C), Investment expenditure (I), Government expenditure (G), Export expenditure (X) and import expenditure (M), This gives us: AD= C+I+G+X-M. Aggregate supply (AS) on the other hand is the total supply of goods and services in the economy. Increasing AD and decreasing AS both cause demand-pull and cost-push inflation respectively. Demand pull inflation occurs when aggregate demand (AD) continuously rises, detailed in Figure 1. The AD curve continuously shifts to the right, as demand continuously increases, from point a to b to c. This consequently causes an increase in the price level of goods and services. As prices rise, costs of production also increase, causing producers to reduce output (a decrease in aggregate supply (AS)), shifting the AS curve to the left and leading to yet another increase in prices, (t...
When the price of raw material will go up or down, the production coats will rise or fall. Secondly, the price of substitute products also affect the supply curve. Because the relatived products are competitive relationship, when the price of one product goes up, another will goes down. It will affect suppy. Thirdly, production technology will affect the supply curve. When the level of technology is rising or falling , the production costs will go down or up. finally, the government policies will affect the supply curve. Positive policies will make the supply go up, conversely, it will go down. For example, the govenrment limit the amount of cars which people can buy, it will caused the supply curve down. In addition, the price of product in the future and the development of product company will also affect the supply
It is difficult for government to achieve all the macroeconomics objectives at the same time. Conflicts between macroeconomics objectives means a policy irritating aggregate demand may reduce unemployment in the short term but launch a period of higher inflation and exacerbate the current account of the balance of payments which can also dividend into main objectives and additional objectives (N. T. Macdonald,