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.
Nationality is the legal relationship between a person and a state. Nationality affords the state jurisdiction over the person and affords the person the protection of the state.What these rights and duties are vary from state to state.n English and some other languages, the word nationality is sometimes used to refer to an ethnic group (a group of people who share a common ethnic identity, language, culture, descent, history, and so forth).