
Gossen's First Law, also known as the Law of Diminishing Marginal Utility, states that the utility derived from each successive unit of a commodity diminishes. This law was first explained by German economist Hermann Heinrich Gossen, based on general observations of human behaviour. The law assumes that consumption is a continuous process and that the consumer is rational. As per the law, the total utility increases at a decreasing rate as an individual consumes more of a commodity. However, after a certain point, the total utility decreases, and the marginal utility becomes negative, indicating that the individual no longer needs that commodity.
| Characteristics | Values |
|---|---|
| Name | Gossen's First Law |
| Other Names | Law of Diminishing Marginal Utility |
| Definition | The utility derived from each successive unit of a commodity diminishes |
| Application | The law is relevant only when marginal utility is decreasing |
| Assumptions | Consumption is a continuous process with no time gap; the consumer is a rational economic man; the consumer's mental condition remains normal during consumption |
| Example | The first orange provides a hungry person with utility, but the utility derived from the second orange is less than the first, and so on |
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What You'll Learn

Marginal utility diminishes as consumption increases
Gossen's First Law, also known as the Law of Diminishing Marginal Utility, states that the utility derived from each successive unit of a commodity diminishes. In other words, the more of a commodity a person consumes, the less utility they get from each additional unit. This law is based on the assumption that consumption is a continuous process and that the consumer is rational.
To understand this concept better, let's use the example of oranges. Suppose you are hungry and decide to eat some oranges. The first orange provides you with a certain level of utility, or satisfaction. The second orange will still be enjoyable, but the increase in satisfaction will be less than it was with the first orange. This pattern continues with each additional orange, and eventually, you may reach a point where eating more oranges provides no additional satisfaction. This is because your want for oranges is getting satiated as you consume more of them.
The law of diminishing marginal utility can be applied to various aspects of life, including experiences. For example, even the most beautiful place in the world or the sweetest music can become boring after a while. This is because, as you continue to experience these things, the marginal utility decreases, and eventually, it may become negative.
Gossen's First Law has important implications for economics and consumer behaviour. It suggests that consumers will eventually reach a point of diminishing returns, where the additional utility gained from consuming more of a product is not worth the cost. This can impact purchasing decisions and the way businesses market their products.
It's worth noting that Gossen's laws are named after Hermann Heinrich Gossen, a 19th-century German economist who first explained the law of diminishing marginal utility based on general observations of human behaviour.
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Total utility increases at a decreasing rate
Gossen's First Law, also known as the Law of Diminishing Marginal Utility, states that the utility derived from each successive unit of a commodity diminishes. In other words, the more of a commodity a person consumes, the less utility they will derive from each additional unit of consumption. This law is based on the assumption that human wants are satiable, and that at a certain point, an individual will become bored or satiated with a commodity, even if it was once highly desirable to them.
To understand this concept better, consider the following example: Imagine you are hungry and decide to eat some oranges. The first orange you eat will provide you with a significant amount of utility, as it satisfies your hunger. However, as you continue to eat more oranges, the utility derived from each additional orange will decrease. This is because your hunger is gradually being satisfied, and at a certain point, you may even become bored or tired of eating oranges.
The total utility derived from consuming a commodity is the sum of the utilities derived from each unit of consumption. In the case of our orange example, if we assume that the first orange provides 6 units of utility, the second 5 units, the third 4 units, and so on, the total utility derived from consuming six oranges would be 21 (6 + 5 + 4 + 3 + 2 + 1 = 21). As shown in this example, the total utility increases as more oranges are consumed, but at a decreasing rate. This is because the utility derived from each additional orange is less than the previous one.
Gossen's First Law has important implications for understanding consumer behavior and decision-making. It suggests that consumers will seek to maximize their total utility by allocating their expenditures in a way that takes into account the diminishing marginal utility of each additional unit of consumption. This can lead to consumers switching to alternative commodities that provide unique benefits or utilities.
In conclusion, Gossen's First Law, or the Law of Diminishing Marginal Utility, explains that total utility increases at a decreasing rate as more units of a commodity are consumed. This law is based on observations of human behavior and has influenced our understanding of economics and consumer behavior.
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Human wants are satiable
Gossen's First Law, also known as the Law of Diminishing Marginal Utility, is based on the idea that human wants are satiable. This means that, at a certain point, an individual's desire for a particular commodity will be satisfied, and they will no longer need or want more of it. This concept is central to the Law of Diminishing Marginal Utility, which states that the utility or satisfaction derived from each additional unit of a commodity decreases as consumption increases.
To understand this, let's consider an example. Imagine you are hungry and decide to eat some oranges. The first orange you eat will provide a significant amount of utility, as it satisfies your hunger. However, as you continue eating more oranges, the utility derived from each successive orange decreases. The second orange may still be enjoyable, but it won't provide the same level of satisfaction as the first. This pattern continues with each additional orange, and eventually, you may reach a point where eating another orange provides no additional utility or even leads to negative utility, such as feeling uncomfortably full or bored of the taste.
The concept of human wants being satiable is crucial to Gossen's First Law. It acknowledges that individuals have a finite capacity for consumption and that their wants can be satisfied. As people consume more of a commodity, their total utility increases initially, but at a decreasing rate. Eventually, a point of satiation is reached, and further consumption leads to a decline in total utility, with the marginal utility becoming negative.
This principle can be applied to various aspects of life, including leisure activities, consumption of goods, or experiences. For instance, consider a movie enthusiast. While they may initially enjoy watching movies, there will come a point where their desire to watch more movies diminishes. They may still appreciate the occasional movie, but their overall interest or want for movies has been satisfied, and they are now open to exploring other leisure activities.
In summary, the idea that human wants are satiable is fundamental to Gossen's First Law. It recognizes that individuals' desires for specific commodities or experiences can be fulfilled, and further consumption beyond that point may lead to diminishing returns in terms of utility or satisfaction. This concept has important implications for understanding consumer behavior and decision-making in economics.
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Commodities are not perfect substitutes
Gossen's First Law, also known as the Law of Diminishing Marginal Utility, states that the utility derived from each successive unit of a commodity diminishes. In other words, the more of a commodity a person consumes, the less utility they gain from each additional unit. For example, if an individual is hungry, the first orange they eat will provide a high level of utility by satisfying their hunger. However, as they continue to eat more oranges, the utility derived from each subsequent orange decreases, and eventually, they may become bored or satisfied and no longer desire any more oranges.
This law assumes that consumption is a continuous process without any time gaps and that the consumer is rational. It also assumes that the consumer's mental condition remains normal during consumption. Gossen's First Law has two important implications. Firstly, it recognizes that human wants are satiable. Even for something an individual greatly enjoys, there comes a point where they become bored or satisfied and no longer desire more of it.
Secondly, Gossen's First Law acknowledges that commodities are not perfect substitutes. Each commodity is unique in its usage, and individuals may switch to another commodity due to its unique characteristics or their changing preferences. For example, an individual may prefer apples over oranges, even if both fruits provide similar nutritional benefits, because of personal taste or other factors.
The concept of commodities not being perfect substitutes is essential in understanding consumer behavior and market dynamics. It highlights that consumers make choices based on their individual preferences, and these preferences can change over time. For instance, a consumer may initially prefer a particular brand of smartphone due to its features and performance. However, as their needs evolve or new technologies emerge, they may switch to another brand or product that better aligns with their updated preferences or requirements.
Furthermore, the understanding that commodities are not perfect substitutes has implications for pricing and competition in markets. If commodities were perfect substitutes, consumers would be indifferent between them, and price would be the sole determining factor in their choices. However, since commodities have unique characteristics and utilities, producers can differentiate their products and compete on factors beyond just price. This encourages innovation, product differentiation, and marketing strategies that appeal to consumers' preferences and needs, ultimately driving progress and diversity in the marketplace.
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Marginal utility may increase initially
Gossen's First Law, also known as the Law of Diminishing Marginal Utility, states that the utility derived from each successive unit of a commodity diminishes. In other words, as an individual consumes more of a commodity, the total utility increases at a decreasing rate, and after a certain point, the total utility decreases, and the marginal utility becomes negative. This concept is based on the idea that an individual's desire for a particular commodity will be satiated once they have consumed a certain amount of it.
This initial increase in marginal utility can be explained by the fact that human wants are satiable. As an individual consumes more of a commodity, they may experience a greater sense of satisfaction or utility. However, it is important to note that this initial increase in marginal utility is not always observed and may vary depending on the individual and the commodity in question.
Additionally, the uniqueness of commodities plays a role in the initial increase in marginal utility. Commodities are not perfect substitutes for one another, and each commodity has its unique usage and characteristics. As a result, an individual may switch between commodities to satisfy their needs or preferences, leading to an initial increase in marginal utility for each new commodity consumed.
It is worth noting that Gossen's First Law specifically focuses on the point at which marginal utility starts to decrease. The law assumes that consumption is a continuous process and that the consumer is rational and in a normal mental state. While the marginal utility may initially increase, Gossen's First Law emphasizes that there will eventually be a point of diminishing returns, where the marginal utility decreases as consumption increases.
In summary, while Gossen's First Law states that marginal utilities diminish across decision-making ranges, it is recognized that marginal utility may increase initially in some cases. This initial increase can be attributed to factors such as the satiability of human wants and the unique characteristics of commodities. However, the law emphasizes that this increase is not sustained indefinitely, and eventually, the marginal utility will start to decrease as consumption continues.
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Frequently asked questions
Gossen's First Law, also known as the Law of Diminishing Marginal Utility, states that the utility derived from each successive unit of a commodity diminishes. In other words, as an individual consumes more of a commodity, the total utility increases at a decreasing rate, and after a certain point, the total utility decreases and the marginal utility becomes negative.
Imagine you are hungry and decide to eat some oranges. The first orange provides a significant amount of utility, satisfying your hunger. However, the utility derived from the second orange is less than the first, and this pattern continues with each additional orange consumed. Eventually, after consuming too many oranges, you may even reach a point where the utility becomes negative, feeling dissatisfied or bored with oranges.
Gossen's First Law has important implications for understanding consumer behaviour and decision-making. It suggests that consumers will eventually reach a point of diminishing returns, where additional units of a commodity provide less utility. This can influence purchasing decisions, as consumers may seek to maximise their total utility by diversifying their consumption or allocating expenditures differently.






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