The marginal utility of a good is derived from its most important use to a person.
For an individual, the marginal utility of a good or service might actually be increasing.
This was the first time an economist had put forward a theory of demand derived from marginal utility.
However, this applies to all factors of production and also to marginal utility.
He asked me if I had ever considered the marginal utility of going out with women.
Prices are supposed to measure the "marginal utility" of the commodity.
It is further assumed that individuals will eventually experience diminishing marginal utility.
In such cases, the marginal utility of a good or service might actually be increasing.
Some cars described as such have very marginal off-track utility.
The diminishing marginal utility of income explains why the family would work fewer hours.