Parker v. Brown, 317 U.S. 341 (1943), was a United States Supreme Court case on the scope of United States antitrust law.

It held that actions taken by state governments were exempt from the scope of the Sherman Act.

The case was an appeal from a decree of a district court of three judges enjoining the enforcement, against the appellee, of a marketing program adopted pursuant to the California Agricultural Prorate Act.

The Supreme Court clarified its position in later judgments.

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