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When the effects of one treatment persist and influence responses to the next treatment, the researcher has the problem of
Public Good
An offering of products or services to every member of society at no cost, provided by either governmental bodies or private organizations, without aiming for financial gain.
Not Excludable
A characteristic of certain goods where it is not feasible to prevent individuals from consuming the good, such as public parks.
Not Rival
Refers to a good's characteristic where one person's consumption does not reduce the availability of the good for consumption by others.
Common Resources
Natural or man-made resources that are not owned by anyone, are available for use by more than one person, and can be depleted.
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