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    Market-Supply, Demand & Supply Demand Curve

    Dr Abdul Aziz Awan
    Dr Abdul Aziz Awan


    Pisces Number of posts : 685
    Age : 56
    Location : WHO Country Office Islamabad
    Job : National Coordinator for Polio Surveillance
    Registration date : 2007-02-23

    Market-Supply, Demand & Supply Demand Curve Empty Market-Supply, Demand & Supply Demand Curve

    Post by Dr Abdul Aziz Awan Mon Dec 15, 2008 12:04 pm

    MARKET DEFINITION
    In marketing, the term market refers to the group of consumers or organizations that is interested in the product, has the resources to purchase the product, and is permitted by law and other regulations to acquire the product. The market definition begins with the total population and progressively narrows as shown in the following diagram.
    DIAGRAM
    https://i.servimg.com/u/f70/11/10/02/04/pic-010.gif

    Beginning with the total population,various terms are used to describe the market based on the level of narrowing:
    Total population
    Potential market - those in the total population who have interest in acquiring the product.
    Availablemarket - those in the potentialmarket who have enough money to buy the product.
    Qualified available market - those in the available market who legally are permitted to buy the product.
    Target market - the segment of the qualified available market that the firm has decided to serve (the served market).
    Penetrated market - those in the target market who have purchased the product. In the above listing, "product" refers to both physical products and services.The size of the market is not necessarily fixed. For example, the size of the available market for a product can be increased by decreasing the product's price, and the size of the qualified available market can be increased through changes in legislation that result in fewer restrictions on who can buy the product.Defining the market is the first step in analyzing it. Since the market is likely to be composed of consumers whose needs differ, market segmentation is useful in order to better understand those needs and to select the groups within the market that.
    Market Definition: A market is any place where the sellers of a particular good or service can meet with the buyers of that goods and service where there is a potential for a transaction to take place. The buyers must have something they can offer in exchange for
    there to be a potential transaction.
    Supply Definition:
    (1) The total amount of a good or service available for purchase; along with demand, one of the two key determinants of price.
    (2) To fill up, or keep full; to furnish with what is wanted; to afford, or furnish with, a sufficiency; as, rivers are supplied by smaller streams; an aqueduct supplies an artificial lake; -- often followed by with before the thing furnished; as, to supply a furnace with fuel; to supply soldiers with ammunition.
    Demand Definition:
    (1) Demand is the want or desire to possess a good or service with the necessary goods, services, or financial instruments necessary to make a legal transaction for those goods or services.
    (2) The amount of a particular economic good or service that a consumer or group of consumers will want to purchase at a given price.The demand curve is usually downward sloping, since consumers will want to buy more as price decreases. Demand for a good or service is determined by many different factors other than price, such as the price of substitute goods and complementary goods. In extreme cases, demand may be completely unrelated to price, or nearly infinite at a given price. Along with supply, demand is one of the two key determinants of the market price.
    (3) Demand is the relationship between price and quantity demanded for a particular good and service in particular circumstances. For each price the demand relationship tells the quantity the buyers want to buy at that corresponding price. The quantity the buyers want to buy at a particular price is called the Quantity Demanded.
    Supply and demand is an economic model describing effects on price and quantity in a market. It predicts that in a competitive market, price will function to equalize the quantity demanded by consumers, and the quantity supplied by producers, resulting in an economic equilibrium of price and quantity. The model incorporates other factors changing equilibrium as a shift of demand and/or supply.
    DIAGRAM
    https://i.servimg.com/u/f70/11/10/02/04/pic-i10.png
    Supply schedule
    The supply schedule, graphically represented by the supply curve, is most often expressed by the relationship between market price and amount of goods produced. In short-run analysis, where some input variables are fixed, a positive slope can reflect the law of diminishing marginal returns, which states that beyond some level of output, additional units of output require larger amounts of input. In the long-run, where no input variables are fixed, a positively-sloped supply curve can reflect diseconomies of scale.For a given firm in a perfectly competitive industry, if it is more profitable to produce than to not produce, profit is maximized by producing just enough so that the producer's marginal cost is equal to the market price of the good.
    DIAGRAM
    https://i.servimg.com/u/f70/11/10/02/04/pic-ii10.png
    The supply curve of labor is a perfect example of increasing net input(e.g., wages) above a certain pointresulting in decreased net output (hours worked).Occasionally, supply curves bendbackwards. A well known example is the backward bending supply curve of labour. Generally, as a worker's wage increases, he iswilling to work longer hours, since the higher wages increase the marginalutility of working, and the opportunitycost of not working. But when the wage reaches an extremely high amount,the employee may experience the law of diminishing marginal utility.The large amount of money he is making will make further money of little valueto him. Thus, he will work less and less as the wage increases, choosing instead to spend his time in leisure. The backwards-bending supply curve has also been observed in non-labor markets, including the market for oil: after the skyrocketing price of oil caused by the 1973 oil crisis, many oil-exporting countries decreased their production of oil.
    The supply curve for public utility production companies is unusual. A large portion of their total costs are in the form of fixed costs. The supply curve for these firms is often constant
    more of the good. Just s the supply curves reflect marginal cost curves, demand curves can be de(shown as a horizontal line). Another postulated variant of a supply curve is that for child labor. Supply will increase as wages increase, but at a certain point a child's parents will pull the child from the child labor force due to cultural pressures and a desire to concentrate on education. The supply will not increase as the wage increases, up to a point where the wage is high enough to offset these concerns. For a normal demand curve, this can result in
    two stable equilibrium points - a high wage and a low wage equilibrium point.
    Demand schedule
    The demand schedule, depicted graphically as the demand curve, represents the amount of goods that buyers are willing and able to purchase at various prices, assuming all other non-price factors remain the same. The demand curve is almost always represented as downwards-sloping, meaning that as price decreases, consumers will buy described as marginal utility curves.The main determinants of individual demand are: the price of the good, level of income, personal tastes, the population (number of people), the government policies, the price of substitute goods, and the price of complementary goods.The shape of the aggregate demand curve can be convex or concave, possibly depending on income distribution. As described above, the demand curve is generally downward sloping. There may be rare examples of goods that have upward sloping demand curves. Two different hypothetical types of goods withupward-sloping demand curves are a Giffen good(an inferior, but staple, good) and a Veblen good(a good made more fashionable by a higher price).
    Dr Abdul Aziz Awan
    Dr Abdul Aziz Awan


    Pisces Number of posts : 685
    Age : 56
    Location : WHO Country Office Islamabad
    Job : National Coordinator for Polio Surveillance
    Registration date : 2007-02-23

    Market-Supply, Demand & Supply Demand Curve Empty Re: Market-Supply, Demand & Supply Demand Curve

    Post by Dr Abdul Aziz Awan Mon Dec 15, 2008 12:11 pm

    Changes in market equilibrium
    Practical uses of supply and demand analysis often center on the different variables that change equilibrium price and quantity, represented as shifts in the respective curves. Comparative statics of such a shift traces the effects from the initial equilibrium to the new equilibrium.
    Demand curve shifts
    DIAGRAM
    https://i.servimg.com/u/f70/11/10/02/04/pic-ii11.png

    [justify]An out-ward or right-ward shift in demand increases both equilibrium price and quantity When consumers increase the quantity demanded at a given price, it is referred to as an increase in demand. Increased demand can be represented on the graph as the curve being shifted outward. At each price point, a greater quantity is demanded, as from the initial curve D1 to the new curve D2. More people wanting coffee is an example. In the diagram, this raises the equilibrium price from P1 to the higher P2. This raises the equilibrium quantity from Q1 to the higher Q2. A movement along the curve is described as a "change in the quantity demanded" to distinguish it from a "change in demand," that is, a shift of the curve. In the example above, there has been an increase in demand which has caused an increase
    in (equilibrium) quantity. The increase in demand could also come from changing tastes and fads, incomes, complementary and substitute price changes, market expectations, and number of buyers. This would cause the entire demand curve to shift changing the equilibrium price and quantity. If the demand decreases, then the opposite happens: an inward shift of the curve. If the demand starts at D2, and decreases to D1, the price will decrease, and the quantity will decrease. This is an effect of demand changing. The quantity supplied at each price is the same as before the demand shift (at both Q1 and Q2). The equilibrium quantity, price and demand are different. At each point, a greater amount is demanded (when there is a shift from D1 to D2).
    Supply curve shifts
    DIAGRAM
    https://i.servimg.com/u/f70/11/10/02/04/pic-iv10.png
    An out-ward or right-ward shift in supply reduces equilibrium price but increases quantity When the suppliers' costs change for a given output, the supply curve shifts in the same direction. For example, assume that someone invents a better way of growing wheat so that the cost of wheat that can be grown for a given quantity will decrease. Otherwise stated, producers will be willing to supply more wheat at every price and this shifts the supply curve S1 outward, to S2—an increase in supply. This increase in supply causes the equilibrium price to decrease from P1 to P2. The equilibrium quantity increases from Q1 to Q2 as the quantity demanded increases at the new lower prices. In a supply curve shift, the price and the quantity move in opposite directions. If the quantity supplied decreases at a given price, the opposite happens. If the supply curve starts at S2, and shifts inward to S1, the equilibrium price will increase, and the quantity will decrease. This is an effect of supply changing. The quantity demanded at each price is the same as before the supply shift (at both Q1 and Q2). The equilibrium quantity, price and supply changed. When there is a change in supply or demand, there are four possible movements. The demand curve can move inward or outward. The supply curve can also move inward or outward.
    Vertical supply curve (Perfectly Inelastic Supply)
    DIAGRAM
    https://i.servimg.com/u/f70/11/10/02/04/pic-v10.png
    When demand D1 is in effect, the price will be P1. When D2 is occurring, the price will be P2.
    Notice that at both values the quantity is Q. Since the supply is fixed, any shifts in demand will only affect price. It is sometimes the case that a supply curve is vertical: that is the quantity supplied is fixed, no matter what the market price. For example, the surface area or land of the world is fixed. No matter how much someone would be willing to pay for an additional piece, the extra cannot be created. Also, even if no one wanted all the land, it still would exist. Land therefore has a vertical supply curve, giving it zero elasticity (i.e., no
    matter how large the change in price, the quantity supplied will not change). Supply-side economics argues that the aggregate supply function – the total supply function of the entire economy of a country – is relatively vertical. Thus, supply-siders argue against government stimulation of demand, which would only lead to inflation with a vertical supply curve.
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