The role of markets and money Revision Notes

The Law of Demand

The Law of Demand states that there is an inverse relationship between price and quantity demanded, assuming all other factors remain constant (ceteris paribus). This means as the price of a good or service increases, the quantity consumers are willing and able to buy decreases, and as the price decreases, the quantity demanded increases. This concept is fundamental to understanding market behaviour and forms the basis of the downward-sloping demand curve.

Demand vs. Quantity Demanded

It's important to distinguish between 'demand' and 'quantity demanded'. Quantity demanded refers to a specific point on the demand curve, representing the amount consumers are willing and able to buy at a particular price. A change in price causes a movement along the existing demand curve. 'Demand', however, refers to the entire relationship between price and quantity, represented by the entire demand curve. A change in demand means the entire curve shifts, caused by non-price factors.

Determinants (Shifters) of Demand

Several non-price factors can shift the entire demand curve, indicating a change in demand at every price level. These include: 1. Consumer Income: For normal goods, demand increases with income; for inferior goods, demand decreases. 2. Tastes and Preferences: Changes in consumer liking can shift demand. 3. Prices of Related Goods: For substitutes, a rise in one's price increases demand for the other. For complements, a rise in one's price decreases demand for the other. 4. Population: An increase in population generally leads to increased demand. 5. Expectations: Future price or income expectations can influence current demand. For instance, if consumers expect prices to rise, current demand might increase.

Representing Demand Graphically and Mathematically

Demand is typically illustrated with a demand curve on a graph, where price is on the vertical axis and quantity demanded is on the horizontal axis. Due to the Law of Demand, this curve usually slopes downwards from left to right. Mathematically, demand can be expressed as a demand function, Q_d = a - bP, where Q_d is quantity demanded, P is price, 'a' represents the quantity demanded when price is zero (or the effect of non-price factors), and 'b' is the coefficient representing the responsiveness of quantity demanded to price changes. Understanding this allows analysis of price impacts.

What is Competition?

Competition describes the struggle among businesses seeking to attract customers and achieve sales and profit targets. It is a core feature of market economies. Firms compete through various strategies including pricing, product differentiation, advertising, and convenience of access. The degree of competition in a market can vary significantly, ranging from intense rivalry among many small firms to a single dominant supplier.

Benefits of Competition

Strong competition typically leads to several positive outcomes for consumers and the economy. These include lower prices for goods and services as firms try to undercut rivals, improved product quality as firms innovate to stand out, greater consumer choice due to a wider variety of offerings, and increased efficiency as firms strive to reduce costs to maintain competitiveness. Innovation is also encouraged as firms seek new ways to gain market share.

Consequences of Limited Competition

When competition is weak or non-existent, firms may gain significant market power. This can result in higher prices for consumers, as businesses face less pressure to keep costs down. Reduced choice and poorer quality products may also follow, as there is less incentive for firms to innovate or respond to consumer demands. Monopolies, where a single firm dominates, can exploit consumers due to their lack of alternatives. This highlights the importance of regulatory bodies promoting competition.

Government Role in Promoting Competition

Governments play a crucial role in maintaining and promoting competition through competition policy. This involves preventing anti-competitive practices like price-fixing collusion, blocking mergers that would create excessive market dominance, and regulating monopolies. Such policies aim to ensure markets remain fair and efficient, safeguarding consumer interests and fostering economic growth. Competition authorities investigate potential breaches of competition law.

The Law of Supply and Supply Curve

The law of supply establishes a direct relationship between price and quantity supplied. As the market price of a good or service increases, producers are incentivised by higher potential profits to increase the quantity they are willing and able to supply. Conversely, if prices fall, the quantity supplied tends to decrease. This relationship is typically represented graphically by an upward-sloping supply curve. A movement along this curve indicates a change in quantity supplied due to a change in price, with all other factors remaining constant.

Factors Influencing Supply (Non-Price Determinants)

Several factors, apart from the good's own price, can shift the entire supply curve. These include changes in the costs of production, such as labour wages, raw material prices, or energy costs. An increase in production costs will decrease supply (shift left), while a decrease will increase supply (shift right). Technological advancements often lead to more efficient production methods, reducing costs and increasing supply. Government policies like subsidies (which decrease production costs for firms) increase supply, whereas indirect taxes (which increase costs) decrease supply. Producers' expectations about future prices also play a role; if they expect higher future prices, they might reduce current supply to sell more later. Finally, the number of firms in the market directly impacts total supply: more firms generally mean greater supply.

Distinction Between Change in Quantity Supplied and Change in Supply

It is crucial to differentiate between a 'change in quantity supplied' and a 'change in supply'. A 'change in quantity supplied' refers to a movement along the existing supply curve, caused solely by a change in the price of the good or service itself. For example, if the price of apples goes up, farmers will supply more apples, moving to a higher point on their supply curve. A 'change in supply', however, refers to a shift of the entire supply curve either to the left (decrease in supply) or to the right (increase in supply). This shift is caused by a change in any of the non-price determinants of supply, such as a new, more efficient production technology or a government subsidy.

Functions of Money

Money primarily functions as a medium of exchange, meaning it is widely accepted for goods and services. This eliminates the need for bartering, which required a 'double coincidence of wants'. Secondly, money acts as a store of value, allowing wealth to be held and saved for future use, although its value can be affected by inflation. Lastly, money serves as a measure of value (or unit of account), providing a common standard for pricing and valuing different goods and services, making comparisons easier and aiding economic calculations.

Types of Financial Markets

Financial markets are venues for buying and selling financial assets. Key types include stock markets, where shares of companies are traded, allowing businesses to raise equity capital and investors to own a part of the company. Bond markets deal with debt securities, where issuers (like governments or corporations) borrow money from investors who are paid interest. Foreign exchange markets are where national currencies are bought and sold, enabling international trade and investment. Each market facilitates different financial activities necessary for economic activity.

Role of Financial Markets in the Economy

Financial markets play a vital role in allocating capital efficiently. They connect savers (those with surplus funds) with borrowers (those needing funds for investment). This channeling of savings into productive investments, such as business expansion or infrastructure projects, fuels economic growth. They also provide liquidity, allowing assets to be converted into cash easily, and facilitate risk management through various financial instruments. Without effective financial markets, access to capital would be severely limited, hindering innovation and economic development.

Impact of Well-Functioning Financial Markets

Efficient and stable financial markets contribute significantly to economic stability and growth. They reduce the cost of capital for businesses, encouraging investment. They offer diverse opportunities for individuals to save and invest, promoting wealth creation. By enabling governments to borrow, they support public services and infrastructure. Conversely, poorly regulated or unstable financial markets can lead to economic crises, demonstrating their critical importance for a healthy economy.