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How does the recent novel Coronavirus (Covid-19) affect the circular flow of goods and incomes. Explain your answer.

Assignment Brief

Question 1 (12 marks)

  1. How does the recent novel Coronavirus (Covid-19) affect the circular flow of goods and incomes. Explain your answer. (2 points)

  2. Is there any relationship between short-run average cost curve and long-run average cost curve? Explain your answer. (2 points)                                  

  3. Delta Ltd. is a business firm which produces hand liquid soap. The following diagram shows the cost and revenue curves of Delta

    1. Under what kind of competition is Delta ltd operating its business? Explain your answer (1 point)

    2. What is the Profit maximize output for Delta? Shade in the amount of profit it makes in the diagram. (2 points)

    3. At what price and output does the firm break-even and why? (1 point)

  4. Adam, a first-year degree student, wants to improve his immunity system during this Coronavirus epidemic. He has planned to spend his money on purchasing fruits: mango and orange. He wrote down two sets with his preferences between various combinations of mango and orange. Each set should denote combinations in between he is indifferent.

Set 1

Mango

Orange

18

2

14

4

12

8

8

12

6

16

2

20

 

 

Set 2

Mango

Orange

16

2

12

4

10

8

8

12

6

14

2

16

 

 

  1. What is Adam’s marginal rate of substitution of mango for orange in set 2 for 4th orange? (1 point)

  2. What is Adam’s marginal rate of substitution of mango for orange in set 1 for 8th orange? (1 point)

  3. Explain why it cannot be true that both sets are indifferent curves (2 points)

Question 2 (12 Marks): Choose one question (either Set A or Set B)

Set A

Let the price on the market be given by

Suppose there is only one firm in the market with marginal cost equal to 10.

  1. Calculate the resulting quantity for the monopolist when this firm wishes to maximise profit. (4 points)

  2. Suppose there are two firms on the market with marginal costs 6 and 9. Both firms are profit-maximising players on the market.

  3. Calculate the resulting quantities if the firms compete under Cournot (6 points).

  4. Calculate the resulting quantities if the firms compete under Bertrand (2 points)

Set B

  1. Explain the characteristics monopoly, oligopoly, monopolistic and perfect competition markets (3 points)  

  2. Imagine that Sunflower, a private company, recycles bottles and supplies to beverage companies. The following table shows the company’s private marginal costs and external benefits to the society from the company’s recycling (5 points).

Output

(‘000’)

Price (£)

Marginal (private) costs (£)

Marginal external benefit (£)

Marginal social cost (£)

1

80

64

20

 

2

80

60

20

 

3

80

60

16

 

4

80

64

12

 

5

80

68

8

 

6

80

72

8

 

7

80

80

8

 

8

80

88

8

 

9

80

96

8

 

10

80

112

4

 

  1. Please explain the definition of Marginal Social Cost. Calculate the column for marginal social cost in the above table?  (1 mark)

  2. Assuming no government intervention, how much will the firm produce to maximise profits and why? (1 mark)

  3. What is the socially optimum level of output and why? (2 marks)

  4. What subsidy per (‘000’) would the government have to pay the company to encourage it to produce this level of output? (1 mark) 

Do you think that government should give subsidy for environmentally friendly products? Please explain your answer with proper reasons (4 points)

Question 3 (12 points)

The difference between rich and poor is becoming more extreme, and as income inequality widens the wealth gap in major nations, education, health and social mobility are all threatened — Helene D. Gayle

  1. As an economist, how do we measure income inequality of a country? Explain your answer? (3 points)

  2. Analyse the income inequality in the UK in last 50 years (5 points)

    • “The Coronavirus will be a catastrophe for the Poor. Economic activity has ground to a halt as borders shut, cities lock down, and people retreat behind closed doors to stem the spread of COVID-19. Workers are being laid off by the millions.”

  3. What measures should the UK government undertake to reduce income inequality during this coronavirus crisis? (4 points)

Question 4 (12 points)

  1. Suppose you are CEO (Chief executive officer) of Delta Ltd which produces hand liquid soap. Would you follow traditional theory of the firm: profit maximization? Or would you think alternative theories? Explain your answer with proper reasons. (4 points)

  2. Read the following case and answer the following relevant questions (8 points)

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Sample Answer

Economic Principles and Market Behaviour: Circular Flow, Costs, and Policy Measures

Question 1

a) Impact of COVID-19 on the circular flow of goods and incomes

The circular flow of income represents the continuous movement of money, goods, and services between households and firms. COVID-19 has disrupted this flow significantly. Firstly, lockdowns and social distancing measures led to decreased consumer spending, reducing household demand for goods and services. This drop in demand caused firms to cut production, leading to lower incomes for workers and decreased profits for businesses. Consequently, the injections of investment, government spending, and exports were also affected, causing the circular flow to slow down.

Additionally, supply-side disruptions, such as factory closures and international trade restrictions, reduced the availability of goods in the market. Firms experienced higher costs and lower revenues, which further impacted households’ incomes through wage reductions or unemployment. Overall, COVID-19 created both a contraction in consumption and production, weakening the circular flow and highlighting the interdependence between households, firms, and markets.

b) Relationship between short-run and long-run average cost curves

Short-run average cost (SRAC) curves show the cost per unit of output when at least one input is fixed, while long-run average cost (LRAC) curves depict the lowest possible cost per unit when all inputs are variable. The relationship between the two is that the LRAC curve is the envelope of all possible SRAC curves. Each SRAC represents production at a specific plant size or scale. The LRAC shows the minimum cost for producing any level of output when a firm can adjust all inputs. In other words, SRAC curves are short-run snapshots, and LRAC provides a long-term cost perspective, guiding firms in planning optimal production scale.

c) Delta Ltd: Cost and Revenue Analysis

i) Type of competition
Delta Ltd. operates in a monopolistic competition market. This conclusion is based on the existence of differentiated products (hand liquid soap with unique branding or quality), some degree of price-setting power, and the presence of multiple competitors in the market. Unlike perfect competition, Delta can influence price slightly due to product differentiation.

ii) Profit-maximising output
The profit-maximising output occurs where marginal cost (MC) equals marginal revenue (MR). This ensures that producing one more unit does not add more cost than revenue. The area between the average cost (AC) and the price at this output level represents the profit. (In the diagram, shade the rectangle from AC to price level at the profit-maximising output.)

iii) Break-even point
The firm breaks even where price equals average cost (P = AC). At this point, total revenue equals total cost, and the firm earns zero economic profit. The break-even occurs because all explicit and implicit costs are covered, but no extra profit is made.

d) Adam’s Indifference Curves

i) Marginal Rate of Substitution (MRS) in Set 2 for 4th orange

MRS is calculated as the change in mango / change in orange. Between 12 mango & 4 orange and 10 mango & 8 orange:

  • ΔMango = 12 – 10 = 2
  • ΔOrange = 4 – 8 = -4
  • MRS = ΔMango / ΔOrange = 2 / 4 = 0.5
    This means Adam is willing to give up 0.5 mango for 1 additional orange.

ii) MRS in Set 1 for 8th orange

Between 12 mango & 8 orange and 8 mango & 12 orange:

  • ΔMango = 12 – 8 = 4
  • ΔOrange = 8 – 12 = -4
  • MRS = 4 / 4 = 1
    Adam is willing to give up 1 mango for 1 additional orange at this point.

iii) Why both sets cannot be indifference curves

Indifference curves must always slope downward and be convex, reflecting diminishing marginal rate of substitution. Set 2 shows an increasing MRS between some points, violating convexity. Therefore, both sets cannot represent true indifference curves simultaneously.

Lockdowns reduced demand for many goods, while supply disruptions from factory closures slowed production, lowering incomes.

Short-run costs include fixed inputs, long-run costs allow all inputs to vary; the LRAC is the envelope of SRAC curves.

Subsidies internalise positive externalities, encouraging firms to produce socially beneficial goods like recycled materials.

By considering stakeholder interests, sustainable practices, and long-term strategy, firms can maintain profitability and social impact.

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