Examiner's comment
This was the slightly more popular essay on question 1. As with 1(d), candidates provided diagrams to help improve their analysis and there were a wide variety of diagrams that could be effective on this question to strengthen answers when integrated into valid and carefully explained chains of reasoning. Common microeconomic arguments included the impact on tax revenue and price/quantity for both healthy and unhealthy foods. There was again some confusion with the externality diagrams. Although many candidates correctly reproduced externalities diagram, this was very commonly shown on a negative production externalities diagram, which is not relevant to the context of the question. Healthy eating clearly implies it must be based on consumption, and it was difficult to see how a production diagram would add value to the answer, unless, perhaps, linked via the workforce. For macroeconomics, many candidates effectively used the extracts to develop arguments around inequality or focused on the use of tax revenue to improve UK macroeconomic performance. The best answers used an inward shift in SRAS in order to analyse implications such as inflation and reduced growth, although other logical arguments were accepted for other shifts. There was a lot of evidence of effective use of diagrams in this question including incidence of tax, cost and revenue and AS/AD. However, there was some common inaccuracy in the analysis of how the tax would be applied and the question was intended to be an application of an indirect tax, not a direct tax or tariff. Specific taxes (as in Extract C in Denmark) or ad valorem taxes (as with the UK's so called 'sugar tax') were both valid. This answer does have a good amount of context, but it is too focused on a particular type of tax and the AD arguments are tenuous. We ignored the rubbed out D+tax on the first diagram which still shows (the problem of using pencil is that it shows up well). As stated on 1(d), the best approach is to use the diagrams that candidates know well. Good responses used the tax diagram or a cost/revenue diagram to develop effective, top-level KAA microeconomic effects. Whilst a small minority of candidates could draw a negative consumption externality diagram with a tax, this was an overcomplicated and risky approach to scoring top marks, as shown here, and the first diagram was enough to take the micro to Level 4. The externality diagram did not add any marks on the micro side, being negative in production; the macro diagram is also taking the argument to Level 4. The best evaluation again used the context effectively. Candidates should practise reading the case studies under timed conditions to efficiently pick out key points and quotes that they can used in their answers, including for evaluation, as it really lifts their answers to the higher levels. Use of the Danish fat tax as an example of consumers switching to other unhealthy food could be used to make a case for government failure as an effective counter point. This data also allowed informed judgements about whether an indirect tax like this is really the best way forward. This response has been chosen to reflect the ongoing debate about negative externalities in consumption, that clearly can be used in this answer, but is not required for full marks. Certainly a diagram showing negative consumption externalities is neither expected nor required, although it would be one way to score marks if given. This is not advised as an approach, however, and there are much simpler and more effective ways to bring out analysis marks. Here are the concepts they need to know and the diagrams are the only time when they are narrowed down to consumption/production so we must presume that here we mean both types of externalities: 1.3.2 Externalities a) Distinction between private costs, external costs and social costs. b) Distinction between private benefits, external benefits and social benefits. The reason the diagram wasn’t credited is because the description in the text was about consumption and the diagram about production. If you use the negative in production then the two ideas are confused. It came across to the examiners as a confusion between to the two concepts (negative in consumption and negative in production) which the specification clearly states has to be learned. Negative in consumption has to be learned but not drawn so clearly we are saying that the mark scheme will not expect a diagram at this point. Often candidates learn or are taught more than the specification e.g. Nash equilibria, Rostow etc. The point we are making is that you do not have to know everything and there are diminishing returns in overteaching these four diagrams. A better option is a tax diagram or other diagrams such as positive in consumption of the healthy good, but in no way is anyone at an advantage if they have been taught things which are specifically not expected, and the point the senior examiners want to drive home is that you can teach what you will but the candidate cannot be marked down, ever, for not knowing something that someone in another centre has been taught as an extra.
![Examiner's report extract for June 2019 Paper 3 question 1(e)]()