What criterion developed by the DOJ is used to identify all potential competitors within the market?

Question

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The SSNIP (Small but Significant and Non-transitory Increase in Price) criterion is used by the DOJ to identify all potential competitors within a market. It measures the competitive impact of a hypothetical price increase by a monopolist or dominant firm, which helps to identify all the firms that consumers would switch to in response to such an increase. This criterion is widely applied in antitrust analysis and helps to define relevant markets for competition analysis.

What Criterion Developed by the DOJ Is Used to Identify