Examlex
Explain two methods for defining a primary key using SQL.
Market Share
The percentage of an industry's total sales that is earned by a particular company over a specified time period.
Covert Collusion
A secret agreement between firms to fix prices, limit production, or divide markets, which is illegal and anti-competitive.
Cartel
A group of firms behaving like a monopoly.
Competitive Spectrum
The range of competition levels across different markets or industries, from perfect competition to complete monopoly.
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