Explaining Supply and Demand

inelastic-supply-rise-in-demand

Supply and demand are a fundamental basis of economics; they help explain the determination of price and output in different markets. The supply curve shows the amount of goods firms are willing to sell at different prices. At higher prices, it becomes more profitable to sell the goods, so supply tends to rise with the …

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Price Elasticity of Demand (PED)

price-elasticity-demand-formula

Definition: Price elasticity of demand (PED) measures the responsiveness of demand after a change in price. Example of PED If price increases by 10% and demand for CDs fell by 20% Then PED = -20/10 = -2.0 If the price of petrol increased from 130p to 140p and demand fell from 10,000 units to 9,900 …

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Specific tax

specific-tax

A specific tax is a fixed amount of tax placed on a particular good. It is also referred to as a per-unit tax, and the tax will depend on the quantity sold (not price). Examples of specific taxes A tax of £0.40 on 500 ml sugary drinks. A tax of £3.92 per 20 pack of …

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Diagrams for Supply and Demand

rise-in-supply-fall-demand-arrows

This is a collection of diagrams for supply and demand. It is mainly for my benefit, so when creating a post, like the price of tea (or when I’m teaching online) I can easily find a suitable diagram to illustrate what is happening. Demand curve  A contraction on the demand curve is due to higher …

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NHS spending cuts

health care spending % GDP

To what extent has the UK seen cuts in spending to the NHS and health care spending in recent years? In short: Actual spending on the NHS has increased. Real spending per capita has been broadly flat in recent years. As a share of the nations wealth, it is falling and it is true to …

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Income Elasticity of Demand (YED)

normal-luxury-inferior-good

Income elasticity of demand (YED) measures the responsiveness of demand to a change in income. For example, if your income increase by 5% and your demand for mobile phones increased 20% then the YED of mobile phones = 20/5  = 4.0 Definition of Inferior Good This occurs when an increase in income leads to a …

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Shift in Demand and Movement along Demand Curve

shift-in-demand

A shift in demand means at the same price, consumers wish to buy more. A movement along the demand curve occurs following a change in price. Movement along the demand curve A change in price causes a movement along the demand curve. It can either be contraction (less demand) or expansion/extension. (more demand) Contraction in …

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Demand for money

The demand for money refers to how much assets individuals wish to hold in the form of money (as opposed to illiquid physical assets.) It is sometimes referred to as liquidity preference. The demand for money is related to income, interest rates and whether people prefer to hold cash(money) or illiquid assets like money. This …

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