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A-Level Economics October/November 2024 Q2(b): Assess whether the supply of agricultural products is likely to be more price elastic o…
Assess whether the supply of agricultural products is likely to be more price elastic or less price elastic than the supply of manufactured products.
Cambridge A-Level Economics · 9708/21 · October/November 2024 · Question 2(b) · 12 marks (essay)
1 answer
- accepted ✓
Price elasticity of supply (PES) measures the responsiveness of the quantity supplied of a product to a change in its price. It is calculated as the percentage change in quantity supplied divided by the percentage change in price. A PES value less than 1 indicates price inelastic supply, while a value greater than 1 indicates price elastic supply. On balance, the supply of agricultural products is likely to be significantly less price elastic than the supply of manufactured products, particularly in the short run.
The primary reason for the price inelastic supply of agricultural goods is the long and often fixed production time lag. Most crops have a natural growing season, and livestock have biological gestation periods. For example, if the price of wheat rises sharply after it has been planted, farmers cannot instantaneously increase the quantity supplied. They must wait until the next planting season to allocate more land to wheat production. This biological constraint means that in the short run, the supply curve for agricultural products is very steep, or price inelastic. In contrast, a manufacturer of, for instance, clothing, can respond to a price rise much more quickly by introducing overtime shifts, hiring more workers, or running machinery for longer, making supply more price elastic.
Secondly, the ability to store products, or hold stocks, is a key determinant of PES. Manufactured goods are typically durable and can be stored in warehouses at a relatively low cost. If prices rise, firms can release these stocks onto the market, causing a large and rapid increase in quantity supplied. Conversely, if prices fall, they can build up stocks rather than selling. Many agricultural products, such as fresh milk, fruit, and vegetables, are perishable. They cannot be stored for long, meaning farmers must sell their output regardless of the prevailing price, making supply unresponsive to price changes. While some agricultural goods like grains can be stored in silos, the perishability of many others renders their supply highly inelastic.
Furthermore, the mobility of factors of production tends to be lower in agriculture. Land and specialised equipment (like combine harvesters) used for one crop may not be easily adaptable for another. This specificity of factors makes it difficult and costly to switch production in response to price signals. While a manufacturing plant also has specific capital, the labour is often more occupationally mobile, and production lines can sometimes be retooled more easily than land can be repurposed for a completely different type of crop.
However, this assessment depends critically on the time period and technological advancements. In the long run, the supply of agricultural products becomes more elastic. Farmers can acquire more land, invest in new capital like greenhouses or irrigation systems, and switch between different crops over successive seasons. For example, a sustained high price for avocados might lead farmers in suitable climates to replace other crops with avocado trees over a period of several years. Moreover, technological advances such as hydroponics and genetically modified crops can shorten growing cycles and reduce dependency on climate, making the supply of certain agricultural goods more elastic and akin to a manufacturing process.
In conclusion, while acknowledging that in the long run and with modern technology the distinction can blur, the fundamental biological time lags, higher perishability, and lower factor mobility inherent in most agricultural production mean its supply is likely to be less price elastic than that of manufactured products. The ability of manufacturers to adjust labour inputs and utilise stocks provides a degree of responsiveness that is simply not available to most farmers, especially in the short to medium term. Therefore, the generalisation that agricultural supply is more price inelastic holds true in the majority of cases.
How it reaches the top band
- Knowledge / Analysis / Evaluation — The essay demonstrates comprehensive knowledge by accurately defining PES and its determinants (production time, stocks, factor mobility, time horizon). The analysis is detailed and comparative, systematically applying each determinant to both agricultural and manufactured goods with relevant examples (wheat vs. clothing, perishability of milk). The argument is two-sided, first establishing why agricultural supply is inelastic, then providing a counter-argument by considering the long run and the impact of technology (hydroponics, GM crops), which demonstrates strong evaluative skill. The conclusion provides a clear, well-supported judgement that directly answers the question, weighing the arguments presented and highlighting the crucial role of the time frame, thus fulfilling the 'assess' command word and reaching the top band.
Common ways to drop marks
- Listing the determinants of PES without applying them comparatively to both agricultural and manufactured goods.
- Presenting a one-sided argument, typically only explaining why agricultural supply is inelastic, and failing to provide any evaluation or counter-points.
- Neglecting the crucial importance of the time period (short run vs. long run), which is a key tool for evaluation in this context.
- Making overly broad generalisations without acknowledging that both 'agricultural' and 'manufactured' are diverse categories with exceptions (e.g., some manufactured goods like custom-built ships have very inelastic supply).
Examiner tip: For 'assess' questions, always structure your answer around the key determinants of the economic concept and use them to build a balanced argument before reaching a final, justified conclusion.
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