A Level H1 Economics Microeconomics Quiz

A-Level Economics H1 Quiz - Microeconomics (Answer Key)

Section A: Scarcity, Choice, and Market Mechanisms

1. Opportunity Cost: The value of the next best alternative foregone when a choice is made. [2] In government spending, if funds are limited, spending more on healthcare means the government must forgo an equivalent amount of spending on education (or vice versa). [2]
2. PPC Diagram: Diagram should show a shift of the PPC outward. [2] Specifically, the intercept on the capital goods axis should shift further than the consumer goods axis (biased shift). [2] Explanation: Tech breakthrough increases the efficiency of producing capital, expanding the total productive capacity of the economy. [2]
3. Price Mechanism: The process where price signals (rising/falling prices) guide producers and consumers. [2] High demand $\rightarrow$ price $\uparrow \rightarrow$ signal to producers to increase supply (profit motive). [2] Low demand $\rightarrow$ price $\downarrow \rightarrow$ signal to shift resources away. [2]
4. Movement vs Shift: Movement: Change in quantity demanded due to a change in the price of the good itself (e.g., price of apples falls, demand for apples increases). [2] Shift: Change in demand due to non-price factors (e.g., income increases, demand for apples shifts right). [2]
5. Simultaneous Change: Demand increase $\rightarrow$ price $\uparrow$, quantity $\uparrow$. Supply increase $\rightarrow$ price $\downarrow$, quantity $\uparrow$. [3] Result: Equilibrium quantity will definitely increase. [2] The effect on price is ambiguous; it depends on the magnitude of the shift in demand relative to supply. [3]

Section B: Elasticities

6. PED Calculation: $\text{PED} = \frac{-15\%}{10\%} = -1.5$. [2] Absolute value is $1.5 > 1$, therefore demand is price elastic. [2]
7. PES Inelasticity: (1) Time to grow crops: Organic produce takes time to mature; supply cannot increase instantly. [2] (2) Limited land/inputs: Specific organic certifications or land constraints prevent rapid expansion. [2]
8. YED and Inferior Goods: YED measures the responsiveness of demand to a change in income. [2] For inferior goods, YED is negative ($\text{YED} < 0$). [2] As income rises, consumers switch to higher-quality substitutes, causing demand for the inferior good to fall. [2]
9. Revenue Strategy: $\text{PED} = -0.5$ (Inelastic). [2] Since demand is inelastic, the percentage decrease in quantity demanded is smaller than the percentage increase in price. [2] Therefore, the firm should increase the price to increase total revenue. [2]
10. PES Comparison: Digital software: High PES. Low marginal cost of reproduction, scalable instantly. [3] Luxury handbag: Low PES. High craftsmanship requirements, limited raw materials (leather), long production time. [3]

Section C: Market Structures

11. Perfect Competition: (Any two) Large number of buyers/sellers, homogeneous products, perfect information, no barriers to entry/exit. [2]
12. Price Taker: Because the firm is small relative to the market and sells an identical product, it cannot influence the market price. [2] If it raises the price, consumers buy from competitors; if it lowers it, it loses revenue unnecessarily. [2]
13. Monopoly Diagram: Diagram showing $\text{MC} = \text{MR}$ for profit maximization, with price $P$ on the demand curve above $\text{ATC}$. [4] Long-run supernormal profits are maintained via high barriers to entry (e.g., patents, economies of scale, legal monopolies) which prevent new firms from entering and eroding profits. [4]
14. Surplus Impact: Consumer surplus decreases as prices rise and quantity falls. [3] Producer surplus increases as the firm captures more value from the consumer, though some potential surplus is lost to deadweight loss. [3]
15. Dynamic Efficiency: Monopolies earn supernormal profits, which provide the funds for R&D. [3] This allows for innovation and the development of new products/processes, which a perfectly competitive firm cannot afford due to zero long-run economic profit. [3]

Section D: Market Failure and Government Intervention

16. Negative Externality: A cost imposed on a third party who is not part of the transaction. [2] Example: Factory pollution affecting the health of local residents. [2]
17. Merit Goods: Consumers suffer from information failure (undervalue long-term benefits). [3] Positive externalities exist (others benefit from a healthier population), but the individual only considers private benefits. [3] Result: $\text{MPB} < \text{MSB}$, leading to underconsumption. [2] (Wait, marks are 6: 3+3)
18. Tax Diagram: Diagram showing $\text{MPC}$ shifting up to $\text{MSC}$ (or $\text{S}$ shifting left). [4] The tax internalizes the externality, increasing the price and reducing quantity to the socially optimal level $Q_{\text{opt}}$. [4]
19. Public vs Merit: Public goods are non-excludable and non-rival (e.g., national defense). [3] Merit goods are excludable and rival (e.g., education) but are under-consumed due to externalities/information failure. [3]
20. Evaluation: Subsidies lower the price, increasing consumption toward the social optimum. [3] Effectiveness depends on PED; if demand is inelastic, subsidies may not increase consumption much. [3] Regulation (e.g., mandatory schooling) ensures a minimum level of consumption regardless of price. [2] However, regulation can be costly to enforce and lacks the flexibility of market-based incentives. [2]