Factors which determine the value of PES (OCR A-Level Economics): Model Answers

Introduction

• Define Price Elasticity of Supply (PES): PES measures the responsiveness of the quantity supplied of a good to a change in its price.
• State the importance of understanding PES for firms and policymakers.
• Outline the key factors that determine PES: production time, availability of factors of production, mobility of factors, and spare capacity.

Analysis and Evaluation

Factor	Analysis	Evaluation
Production Time	- Short production time means PES is more elastic because firms can quickly increase output.	- Evaluation: Goods with short production times (e.g., food products) have higher PES compared to those with long production times (e.g., heavy machinery). However, for perishable goods, high PES may not always be achievable due to other constraints.
Availability of Factors	- Abundant and easily accessible factors of production lead to higher PES because firms can easily increase supply.	- Evaluation: In contrast, scarcity of factors (e.g., land or skilled labour) limits PES. This is particularly relevant in industries reliant on specific resources (e.g., mining). However, technological advancements can mitigate this constraint.
Mobility of Factors	- High mobility of factors (e.g., labour and capital) allows firms to respond quickly to price changes, increasing PES.	- Evaluation: While high mobility enhances PES, geographical and sector-specific restrictions can limit this flexibility. For example, the immobility of specialised labour can restrict PES despite other factors being favourable.
Spare Capacity	- Firms with spare capacity can increase production easily when prices rise, resulting in a higher PES.	- Evaluation: Firms with no spare capacity face higher costs in scaling up production, reducing PES. This factor is critical in determining PES in industries with fluctuating demand, like electronics or seasonal products.

Conclusion

• Summarise the key factors determining PES and their impact on supply responsiveness.
• Discuss the relative importance of these factors in different industries or contexts.
• Conclude with a reflexion on how an understanding of PES can inform business and economic policy decisions.

Top 3 Tips for Getting 40/40 in This Essay

Tip Number	Tip
1	Comprehensive Analysis with Real-World Examples:- Ensure each factor is analysed with relevant real-world examples. - Illustrate how different industries experience Price Elasticity of Supply (PES) differently due to these factors. - Use specific case studies to strengthen your arguments.
2	Balanced Evaluation:- Provide a nuanced evaluation of each factor, considering both strengths and limitations. - Discuss how external conditions, such as technological changes or government policies, might influence the effectiveness of these factors in determining PES.
3	Clear Structure and Coherent Argumentation:- Maintain a clear and logical structure throughout the essay. - Use a table or similar organisational tool to guide your discussion. - Ensure each section flows smoothly into the next. - Present clear arguments and counterarguments to enhance readability and effectiveness.