7 Although group boycotts such as the one alleged here are usually considered unlawful per se , this case should be analyzed under the rule of reason .
It arises in the context of professional sports. 38 Some kinds of horizontal restraints are sometimes necessary , she explained .
7 Although group boycotts such as the one alleged here are usually considered unlawful per se , this case should be analyzed under the rule of reason because it arises in the context of professional sports. 38 Some kinds of horizontal restraints are sometimes necessary , she explained .