IB Economics SL 2.1 Demand Question Bank
Explain how demand changes, draw the correct demand diagram and connect shifts to prices, quantities and economic decisions.
- Syllabus
- First assessment 2022
- Course
- Economics SL
- Level
- SL
Explain how demand changes, draw the correct demand diagram and connect shifts to prices, quantities and economic decisions.
Study the extract and data below and answer the questions that follow.
Ecuador sees 2014 trade deficit falling with new import rules, but at what cost?
(1) In the period from January to May 2014, Ecuador posted a trade surplus of US$483 million, moving from a deficit of US$626 million one year before.
(2) The government has been implementing an import-substitution policy to reduce the trade deficit. On 4 December 2013, Ecuador's Foreign Trade Committee established new quality control measures for the importation of 293 items, including cosmetics, toys, toothpaste, meat and cereals. In order for goods on the list to be imported a certificate needs to be obtained, ensuring that the products meet quality control standards. There are up to 13 steps to be taken before a product may enter as a result of the excessive regulations holding up the certificates.
(3) The import-substitution policy also involves a move to provide support to domestic industries. The president firmly believes in the benefits of sheltering infant industries. He has complained about imports such as coconut water, banana puree or cornflakes, which he believes could be produced by domestic industries, supported by appropriate policies. In addition, he points out that Ecuador is a top exporter of fine aroma cocoa, but imports approximately US $25 million worth of chocolate per year. Other measures to protect domestic industries include anti-dumping measures and higher tariffs on raw materials and capital equipment that are available in Ecuador.
(4) In the month since this intervention started, different businesses have begun to feel both the advantages and disadvantages. Pica, one of the largest companies in the plastic industry, has taken advantage of the policy. The reduction in the importation of certain products has allowed them to increase their own production.
5 In contrast, Toni Industries, one of the most important dairy businesses in the country has suffered. It has complained that cornflakes, which the company uses as a complementary good to one of its key products, could not get through customs because it did not have the quality control certificate.
(6) Many industry analysts and economists argue that closing off imports will isolate the country and create a false sense of competitiveness. They are also concerned that the government seems to be assuming that other countries will not react. Some argue that the government should seek to create incentives for investment, like tax benefits, or legal security, which would allow the entry of new competitors into the Ecuadorean markets.

Table 1: Selected exports and imports for Ecuador, January to May 2014
www.latinvex.com, 19 March 2014 and www.blogs.wsj.com, 14 July 2014]
Define the term complementary goods indicated in bold in the text (paragraph (5).
Define the term complementary goods indicated in bold in the text (paragraph 5).
Level ..... Marks
0 The work does not reach a standard described by the descriptors below. ..... 0
1 Vague definition. ..... 1
The idea that they are goods that are related to each other.
2 Accurate definition. ..... 2
An explanation that they are goods that are consumed with each other (joint demand) or that they are goods that have negative cross price elasticity of demand.
Explain the view that an increase in price will lead to a decrease in the quantity demanded whilst an increase in demand will lead to an increase in price.
Answers may include:
- definition of demand
- diagrams to illustrate the difference between movements along the demand curve and shifts of the demand curve
- theory to explain an increase in price leading to a decrease in the quantity demanded, due to the law of demand, through a movement along the demand curve, and an increase in demand due to a change in non-price determinants, leading to an increase in price through a shift to the right of the demand curve
- examples of instances to which this might be, or has been, applied.
Assessment Criteria
Part (a) 10 marks
Level 0 (0 marks): The work does not reach a standard described by the descriptors below.
Level 1 (1-3 marks): There is little understanding of the specific demands of the question. Relevant economic terms are not defined. There is very little knowledge of relevant economic theory. There are significant errors.
Level 2 (4-6 marks): There is some understanding of the specific demands of the question. Some relevant economic terms are defined. There is some knowledge of relevant economic theory. There are some errors.
Level 3 (7-8 marks): There is understanding of the specific demands of the question. Relevant economic terms are defined. Relevant economic theory is explained and applied. Where appropriate, diagrams are included and applied. Where appropriate, examples are used. There are few errors.
Level 4 (9-10 marks): There is clear understanding of the specific demands of the question. Relevant economic terms are clearly defined. Relevant economic theory is clearly explained and applied. Where appropriate, diagrams are included and applied effectively. Where appropriate, examples are used effectively. There are no significant errors.