The Percentage of Total Industry Sales Accounted for by the Top

question 58

Multiple Choice

The percentage of total industry sales accounted for by the top firms is called _____.

• A) commonality ratio 
• B) collusion index 
• C) concentration ratio 
• D) barriers to entry

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Definitions:

Existential Generalization

A logical inference rule stating that if an assertion is true for some member of a domain, then there exists an element in that domain for which the assertion holds.

Universal Generalization

A logical principle stating that what is true of all instances of a certain class can be said to be generally true of that class.

Existential Instantiation

A logical principle allowing for the inference of the existence of an instance of a predicate from a statement asserting the existence of some (possibly unspecified) instance.

Universal Instantiation

A logical rule stating that if something is true for everything in a certain category, it is true for each specific member of that category.