Wikipedia refers to marginal value as, the change in economic value associated with a unit change in output, consumption, or some other economic choice variable. Marginal value can also be defined as the additional value added from the next consumed unit. For example, giving a slice of bread to someone without any would be of great value to them. However, the next slice would not have as much value.
A citizen is a participatory member of a political community. Citizenship is gained by meeting the legal requirements of a national, state, or local government. A nation grants certain rights and privileges to its citizens.
citizen(Noun) A person that is a legally recognized as a member of a state, with associated rights and obligations. When the rebellion broke out, the United States promptly evacuated its citizens from the area. citizen(Noun) A member of a state that is not a monarchy; used as antonym to subject. citizen(Noun) A person that is a legally recognized resident of a city or town. citizen(Noun) A resident of any particular place to which the subject feels to belong.