Price Elasticity of Demand (PED)

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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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Diagrams for Supply and Demand

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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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Examples of elasticity

Price elasticity of demand measures the responsiveness of demand to a change in price. Price inelastic – a change in price causes a smaller % change in demand. Price elastic – a change in price causes a bigger % change in demand. Price inelastic demand We say a good is price inelastic, when an increase …

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Factors affecting oil prices in short and long run

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A look at the different factors affecting the price of oil in both short term and long. Readers Question: I’m trying to update myself on what’s happening with oil prices at the moment (partly to prepare myself for uni interviews) but I’m finding very conflicting articles, such as: Article warning of oil rising to $150 …

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What explains the volatility of oil and food prices?

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In a recent post, we looked at food inflation and noted how prices were often volatile. Primary products like food and oil tend to be volatile because: Supply is inelastic in short run. (Supply is unresponsive to temporary shortages of food) Supply can vary due to the weather/geopolitical events. Demand is price inelastic – a …

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Price Mechanism in the Long Term

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Changes in price cause signals in the market mechanism. For example, if there is an increase in demand this will lead to a higher price and a movement along the supply curve. However, in the long run, high prices act as an incentive for firms to supply more. Therefore firms will expand their production or …

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Cross elasticity of demand

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Cross elasticity of demand (XED) measures the percentage change in quantity demand for a good after a change in the price of another. For example: if there is an increase in the price of tea by 10%. and the quantity demanded for coffee increases by 2%, then the cross elasticity of demand = 2/10  = …

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Elasticity in Economics

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Elasticity is an important concept in economics. It is used to measure how responsive demand (or supply) is in response to changes in another variable (such as price). Price Elasticity of Demand The most common elasticity is price elasticity of demand. This measures how demand changes in response to a change in price. See: Price …

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