"Arc elasticity of demand" 是指需求曲线的弹性，它描述了需求量对价格变化的敏感程度。具体来说，如果价格变化百分之一，需求量变化的比例就是需求的arc弹性。
以下是一篇英文范文，描述了arc elasticity of demand的计算方法和应用：
Title: Calculating and Applying Arc Elasticity of Demand
In economics, arc elasticity of demand refers to the sensitivity of a good's demand to changes in price. This measure helps us understand how much consumers are willing to pay for a particular product, and how much they will reduce their purchases if the price increases or decreases.
To calculate arc elasticity of demand, we first need to determine the price change and the corresponding change in quantity demanded. Let's use the following example to illustrate the process:
Say a consumer is willing to pay $50 for a product, but if the price increases to $60, the consumer will reduce their purchases by 20%. This means that the price change was 10% ($60 - $50) and the quantity change was -20% (-$10).
Now, we can calculate arc elasticity using the formula:
Arc elasticity = (Change in quantity / Price change) x 100
In this case, arc elasticity = (-20% / 10%) x 100 = -20.
This negative number indicates that the demand is inelastic, meaning that the consumer will not reduce their purchases by much even if the price increases. On the other hand, an arc elasticity number greater than zero indicates that the demand is elastic, meaning that consumers will respond significantly to changes in price.
Arc elasticity of demand is important for businesses to understand their customers' purchasing behavior and adjust their pricing strategies accordingly. For instance, a manufacturer may want to increase its revenue by pricing its product at a level where demand is relatively elastic. Alternatively, a retailer may want to reduce its inventory by pricing its products at a level where demand is relatively inelastic.
In conclusion, arc elasticity of demand is a useful tool for analyzing consumer behavior and making informed business decisions.
需求弹性（Arc elasticity of demand）是用来描述需求量对价格或其他相关变量变化的敏感程度的概念。它通常用于经济学和市场营销中，用于分析市场和消费者行为。
在英文范文里，需求弹性的概念可能会在不同的上下文中出现，例如在讨论价格策略、市场分析或者消费者行为的研究报告中。以下是一个可能的示例：
"In this study, we examine the arc elasticity of demand for a certain product and find that its price has a significant impact on demand. By analyzing the data, we can see that as the price increases, the demand decreases, indicating that the product has a high elasticity of demand."
以上这段文字主要是在讨论一种产品的需求弹性，并指出价格的变化对需求有显著影响。这只是一个示例，实际的应用可能会根据具体的上下文和需求而变化。
“Arc elasticity of demand”是需求弹性（demand elasticity）的一个术语，表示的是需求对于价格或其他市场条件变化的敏感程度。
在英文范文中最新的变化可能取决于上下文，但一般来说，随着全球化和在线教育的普及，需求弹性的概念在许多领域都变得越来越重要。例如，在电子商务、旅游、教育、医疗保健等行业，价格或条件的变化可能会影响消费者的购买决策，从而影响需求弹性。
如果你有特定的需求或情境，我可以提供更具体的答案。