Competition
Competition is, in general, a contest or rivalry between two or more entities, organisms, animals, individuals, economic groups or social groups, etc., for territory, a niche, for scarce resources, goods, for mates, for prestige, recognition, for awards, for group or social status, or for leadership and profit. It arises whenever at least two parties strive for a goal which cannot be shared, where one's gain is the other's loss (an example of which is a zero-sum game).
Regulation
Regulation is an abstract concept of management of complex systems according to a set of rules and trends. In systems theory, these types of rules exist in various fields of biology and society, but the term has slightly different meanings according to context. For example:
Regulation
The general rule, at least, is that while property may be regulated to a certain extent, if regulation goes too far it will be recognized as a taking.
Oliver Wendell Holmes, Jr., Pennsylvania Coal Company v. H. J. Mahon, 260 U.S. 415, 415 (1922).
Regulation
With anti-trust laws, as with regulatory commissions, a sharp distinction must be made between their original rationales and what they actually do. The basic rationale for anti-trust laws is to prevent monopoly and other conditions which allow prices to rise above where they would be in a free and competitive marketplace. In practice, most of the famous anti-trust cases in the United States have involved some business that charged lower prices than its competitors. Often it has been complaints from these competitors which caused the government to act.
Thomas Sowell, Basic Economics (2010), Ch. 7. Big Business and Government
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