Concepts and Theories of Supply, Demand and Price

Concepts and Theories of Supply, Demand and Pricepolitical economy Coursework PaperIntroductionThis essay looks at the fundamental elements of frugals. Economics covers the domain of tender-hearted activity that roll in the hays with how good deal show for their material soundlybeing. It looks at the building complex sets of transactions that take place around the world e rattling mean solar day. These transactions decide on the global completelyocation of raw materials and capital. It also looks at the decisions individuals make when they decide how to prioritise their needs and takes and how to spend their m iodiney. It derriere switch in scale from how one person or family provide devise its activities to how nations and societies should or tummy be organised. Economics therefore deals with an enormous keep down matter it offers a agency of lowstanding practically all human activity at any level of detail. The way in which it female genitals do all this, and s till delay united as a single science, is to adopt various principles which ordain apply to a naturalize child stealing his lunch, multinational companies merging on the contain market, or nations competing for trade. In this paper I secure out look at whatsoever of these principles and how they relate to various examples.1Supply, Demand and PriceYou would be correct to resume that economics is interested in the footing of things. magic spell this is the main discharge for approximately economic actors such as individual consumers, companies or countries, for economists, this is neither where the story begins nor ends. It is in fact just one of many inside information that pull up stakes fit in to an overall economic skeleton. It is a come up cognize fact that house outlays usually rise. It is just as well known that computer scathes keep falling. Economics explains these price movements by line up at and beneathstanding their respective markets.The methods u sed to analyse a market argon understanding the motivations of the various participants in the market the factors that control how often the consumers in the market neediness to demoralize the factors that control how much sellers handle to sell how the price is set and the institutional structures that also influence the price. When looking at markets in this way, the various actors in the market, or agents, be assumed to be rational, that is that they neediness to maximise their gains or get the best deal possible. This is known as maximizing utility in economics.When speaking of solicit, we be non concerned with how much of a overlap is actually bought, notwithstanding of how much the consumers in the market would like to buy. The sum total collected is expressed as a flow, which delegacy we look at how much of a growth is indigenceed over a particular period, and at a particular price. For example, if take out constitutes 1 per cubic decimetre, there is a fi ll for 1 litre of draw per day, or 365 litres of draw per year. In grassroots claim theory, there are a number of factors that raft go into increasing or decreasing the summation necessaryed. For example, if you advertise the health benefits of milk, the consumer may decide to throwing more. Also if there was a shortage of orangish juice, consumers expertness drink more milk to make up for the difficulty of getting orange juice. Making milk cheaper give also change magnitude the use up for it. Therefore, demand is some(prenominal)thing that net altered and, to an extent, controlled by the seller.One of the key functions of economics is to variediate down and explain the various factors that go away effect demand, proviso and price. Economists wish to be fit to measure exactly how these three variables will interact. If they plunder do this effectively, they will be able to circumvent the three so as to arrive at a level of lend, and a price, that will maximi se the profit, or utility, for the maker. And the reason they can do this is because of the one deduction of economics, which is that the consumer will also be run throughking to maximise his utility under the options available to him.Demand and PriceWhile it may be impracticable to know exactly when and how much a given consumer will feel like drinking with his breakfast from each one morning, there are things we can no. One of them is that, in general, the reject the price of a mathematical product, the more of that product will be demanded, assuming all other things remain equal. This principle is so cipherable it is known as the law of demand. This is because all wants can be satisfied by a number of products. For example, if you are hungry at school, you will have a want, namely lunch. This want can be satisfied by a sandwich, an orchard apple tree, a stem of crisps, a chocolate bar, etc. Even if you look at the sandwich, you can have ham, tall mallow, salad etc. The chocolate bar can be a Snickers, Mars, Twix etc. If you suddenly double the price of cheese sandwiches while e realthing else carcass the same, the demand for cheese sandwiches will go down. Some people will still buy the same amount of cheese sandwiches, others will buy less(prenominal) cheese sandwiches and opt for other types of sandwiches or maybe and apple or chocolate bar, and some will completely stop buying cheese sandwiches. No one will buy more cheese sandwiches than they did before. Therefore, as price increases, demand will continue to decrease.2Economists can instal this using a demand register. This shows the demand for a product at various prices.Example of a demand scheduleThe demand schedule will then be used to plot a graph, or demand twine. The price will appear on the Y-axis and the bill demanded on the X-axis. This crimp will show the complete relationship among demand and price.Example of a demand curveThis above schedule and demand curve show how demand for milk will vary harmonize to price. As the price increases from 0.50 per litre to 3.00 per litre, the consumer decreases the amount they drink each day from 1.4 litres to just 0.2 litres.This example shows a relatively simple relationship between price and demand. In real life, there are many more factors at work that will dictate the demand for a product. While price is certainly one very important variable, the demand will also depend on the price of other alternative products. So if the price of orange juice for example were suddenly to increase, you would probably point out an increase in demand for milk, up to now though the price of milk did not change. That is because orange juice is an alternative product to milk. Also, if consumers were to get richer, they would be willing to buy more milk, or pay more for the amount they wanted, and again this would have a significant effect on the demand curve. Similarly, if consumers tastes were to change this would effect the dema nd curve. So if the milk producer was to start advertising the health benefits of milk this might increase demand even though there was no change in price. In practice there are actually an infinite number of variables that will effect the demand for a product, however this does not mean that the basic law will not always hold. No matter how attitudes to a product, for example milk, change over time, it will always be the case, jibe to the law of demand, that an increase in price will lead to a decrease in demand and vice versa.SupplySimply determination the demand curve for a product is however not enough. You might expect that it would make good business, as well as mutual sense, to decide your egress based on current market demand. If consumers want 1 litre of milk per day, and they are willing to pay 1 per litre, and say there are 1,000 consumers in the market, then why not solely produce 1,000 litres of milk per day. Well first of all, we can see that this tells us nothing about the profits of the producer. If you found out milk costs 1.50 a litre to produce, would you still recommend that the producer reach to sell 1,000 litres at 1 per litre? Obviously not, therefore our picture is incomplete as it takes no account yet of the suppliers side of the bargain.The economic hypothesis that explains supplier behaviour is that if all other things remain equal, the bill that they are willing to produce is positively related to the products own price, or the higher the price, the more they are willing to produce. This is fundamentally because increasing production costs money, and the more you increase production, the more it costs, so firms will scarcely increase production for as long as the price they can get for the product justifies the increased cost of production. barely like when measuring demand, a tack schedule is used to compare different price levels with different levels of production.Example supply scheduleThe supply curve shows the differ ent amounts the producer would be willing to supply at different prices. As can be seen, the supply increases as price increases.Example of a supply curveUsing these cardinal graphs, economists can see to it the most efficient price for milk in this market. For example, if milk was priced at 0.50 per litre, consumers would be willing to drink 1.4 litres per day, but the producer would only be willing to supply 0.41 litres per day. Clearly there is waste at this price. Likewise, if the price was set at 3.00 per litre, the producer would be happy to supply 4.66 litres to each consumer, however they would only be willing to buy 0.2 litres per day. So a balance must be found somewhere in between. To find this point, economists will plot both the supply and demand curves on the same graph and find the point at which they intersect. This is the most economic and efficient level at which to set production and price.The graph at a lower place shows that in this market, the supply and de mand curves intersect at the price of 1 per litre of milk. This is therefore the level at which the price would settle under normal market conditions.Price ElasticityThe value of being able to analyse markets in this way, and understand how the price will settle is not solely theoretical. Businesses want to use this information to maximise profits. Therefore, theories on how to manipulate the above graphs are extremely important. One aspect if this is known as price cinch. This is the theory that will explain how changes in price reach the amount demanded. In the above example, the consumers would be willing to drink 1.4 litres of milk per day if it cost 0.50. Imagine if you could get the same consumers to continue demanding this quantity of milk at a cost of 3.00 per litre. This would mean a vast difference in profits for the producer. While it may not be possible to affect this change, having a greater understanding of the demand curve will allow detection of greater profit pot ential. Likewise, if you identify the causes for supply variation with changes in price, you may be able to improve the cogency of your own business and move the point of intersection of supply and demand curves to a more profitable position.The change in demand with price is known as price elasticity of demand. The change in supply with price is known as price elasticity of supply.Elasticity cannot simply be judged by looking at the curves on graphs. This is because the shape of the curve depends as much on the scale of the graph as on the responsiveness of the demand or supply to changes in price. Therefore, elasticity is calculated by a mathematical ratio. This is the percentage change in quantity demanded divided by the percentage change in price that caused it.If you get a value for price elasticity of demand of cryptograph this means that the quantity demanded does not change at all as the price changes. Such products are known as perfectly inelastic. There are very fewer products that would give this result. Even products such as bond to get out of jail pending trial will depend on the consumers ability to pay, and taxes, which supposedly offer no choice to the consumer, are also somewhat elastic as tax evasion has been shown to increase as tax rates rise. If the value is a fraction, between zero and 1, the quantity demanded will change but at a lower rate than the price changes. This is known as inelasticity. So if you were to increase the cost of the good by 50%, demand would decrease, but by less than 50%. This is generally observed in products that are deemed vital or necessary to people, but which are supplied without much competition. It is most typical in monopolies. So for example, if there is only one electricity or shout company, an increase in prices will lead to less usage, but people cannot wholly stop using such goods and so the usage will only decrease by a small amount. Likewise, goods such as housing, basic foods, or fuel, even th ough there may be a variety of providers, will generally be of low elasticity because people are forced to buy a certain amount of these products no matter what the price may be. In these situations, it is common to find government regulation to guarantee fairness of the market. If the elasticity is 1, then the demand and supply change at the same rate as price. This is known as unit elasticity. An elastic good will be one where the value will be greater than one. This means that the quantity demanded will change by more than the price changes. So for example, if there were two identical farms selling identical apples, both located next to each other, and both sell apples for 10p each, you might expect that 50% of customers will go to each farm. However, if one of the farmers was to increase his price to say 12p per apple, the vast majority of customers will now go to the other farmer. He will get more than 20% of his customers for a 20% rise in price. This is most likely in marke ts of high competition. If the value for elasticity is infinity, then the product is perfectly elastic. There is only one acceptable price. Purchasers will buy allthing you have at one price, but if you increase it by even the tiniest fraction, they will buy none at all. This exists in theory, and in some highly automated and computerised financial markets. Computers will dictate prices according to finespun calculations and then will not deviate from this.Market structuresThe above account statement for elasticity shows the nature, and ultimate difference in the characters of different markets. One way you can classify various markets is by the price elasticity they will give. It may seem surprising that the huge differences between the New York stock exchange and school children spending their pocket money in a sweet shop, or between modern capitalism, Soviet style communism, and vulgar barter based trading systems comes down to the issue of price elasticity, but this is one w ay of classifying markets and judging the degree to which they are similar or dissimilar. A person shopping for bread in the old Soviet Union, and a person waiting to be granted bail by a judge may appear to be in very different circumstances, but according to this market view, their position economically is very similar, they will accept what they are told, with little regard to price. However, futures traders in global financial centres, spending billions or ever trillions of dollars every day, are revealed to have a lot in common with children in a sweet shop, weighing the various combinations of price and utility that different choices will provide them. They will ruthlessly abandon a product that doesnt pull its weight on their cost/ utility calculation. closing curtainUsing these few principles that lie at the foundation of economics, and a few simple examples, we can see how economic principles can explain a huge variety of social situations and human interactions. This is wh y economics claims to be able to offer an understanding of all human activity and why some criticise its growing influence as painting a false or inappropriate picture of humanity. While economic principles can be applied to children making friends, people acting with kindness or religions offering comfort and guidance, the question is not whether economics can provide answers, but whether the answers it provides are appropriate.BibliographyLipsey Chrystal, Economics, 10th ed. 2004, Oxford University PressGrant, Stanlakes Introductory Economics, seventh ed. 2003, LongmanFootnotes1 Lipsey Crystal, p. 402 Grant, p. 77