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Market Power Without A Large Market Share: The Role Of Imperfect Information And Other “Consumer Protection” Market Failures, Robert H. Lande

All Faculty Scholarship

There are two very different sources of market power in antitrust cases. The first is traditional market share-based market power. Market power in antitrust cases also can come from deception, significantly imperfect or asymmetric information, or other types of market failures that usually are associated with consumer protection violations.

When these “consumer protection” market failures are present in antitrust cases, market power can arise even if no firm has a market share large enough for a finding of traditional market share based market power. However, instead of traditional end-use consumers being harmed, the direct victims are businesses.

The “consumer protection” …