20.2
Utility measures the satisfaction an individual gets from consuming products.
Income enables the purchase of these products. So, utility and income are related.
Consider John. As his income increases, he purchases more products, leading to higher utility.
Economists often assume utility can be measured numerically to analyze the relationship between utility and income. Additionally, they assume most people experience diminishing marginal utility of income.
For example, the first $20,000 of John's income provides 20 units of utility, while the next $20,000 adds only 12. Thus, at $40,000, John's total utility increases, but the additional utility from the second $20,000 is less than the first.
This also means that John perceives a loss of income as more significant than an equivalent income gain. For example, if John's income drops from $40,000 to $20,000, he loses 12 utility units. However, an increase from $40,000 to $60,000 gains him only six units of utility.
Understanding the diminishing marginal utility of income helps to analyze consumer behavior.
效用反映了个人消费商品和服务所获得的满足感。随着收入的增加,人们可以购买更多的商品和服务,从而提高整体满意度。因此,效用和收入是相关的。经济学家通常认为效用可以通过数值衡量,以分析效用与收入之间的关系。他们通常认为大多数人都会经历收入边际效用递减。
边际效用递减表明,每增加一美元的收入所带来的满足感…