Data and extracts for question 1

Mark scheme
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Examiner's comment
Price inelastic demand is a key economic concept that most candidates are very familiar with. As can be seen on the markscheme, examiners are looking for candidates to answer the question - i.e. to ‘explain what is meant by price inelastic demand’. Candidates are not asked to explain price elasticity of demand, and so therefore did not receive marks for defining this or for writing out the PED formula. The Knowledge/Analysis marks are found from explaining what price inelastic demand means. One easy way to illustrate this, which surprisingly few candidates did, was to draw a diagram showing an inelastic demand curve. Remember just because you haven't been asked to draw a diagram, doesn't mean you can't still do so and you will receive credit where this aids your explanation. In any 'explain' 5-mark question such as this, candidates should remember that there are two marks for application. This means candidates need to ensure they have two distinct pieces of application in their answer. Many answers were receiving a mark of 4/5 because they only had one piece of application. <6ResultsPlus This answer achieves a mark of 3/5. They earn an application mark for ‘there is no short run substitute for energy’. There are two knowledge/analysis marks for explaining what price inelastic demand means and for the diagram. \ ip ResuitsPlus Drawing a diagram such as in this answer is a good way to gain marks. The question isn't about price elasticity of demand in general so no marks are awarded for the first sentence. <iResultsPlus This answer achieves full marks. The candidate has three knowledge/analysis marks for explaining what inelastic PED means, for fuel costs are a necessity, and for the numerical value is likely to be close to zero. They have achieved the two application marks for the quote from the extract - 'a perfect example of price inelastic demand' and for quoting data from figure 1. aN ots,ResultsPlus Make sure you are spending your valuable time in the exam writing things that will earn you marks - the first three lines of this answer do not earn any marks, as they are not answering the question.
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Notes from the mark scheme and report
- explain price inelastic demand (Qd less responsive than price, PED between 0 and -1, necessity with few substitutes)
- defining PED in general or writing the formula earns nothing
- an inelastic demand diagram earns a mark but few drew one
- two distinct application points needed (85% of homes, no short-run substitute, 50p to 352p per therm) and many scored 4 of 5 with only one
Quantitative skills: QS 8 (make calculations of elasticity and interpret the result); QS 9 (interpret, apply and analyse information in written, graphical tabular and numerical forms)
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