Examlex
Explain the terms relation,tuple,and attribute.
Nonrivalry
A characteristic of a good or service whereby its consumption by one individual does not reduce its availability for consumption by others.
Nonexcludability
The inability to keep nonpayers (free riders) from obtaining benefits from a certain good; a characteristic of a public good.
Public Goods
Goods that are non-excludable and non-rivalrous, meaning they are available to all members of society and one person's consumption does not reduce availability for others.
Public Good
A good or service offered to every member of a society for free, supplied by either government entities or private individuals or groups, without seeking financial gain.
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