462 U.S. 393 (1983) Cited 657 times 11 Legal Analyses
Holding that the employer bears the burden of negating causation in a mixed-motive discrimination case, noting "[i]t is fair that [the employer] bear the risk that the influence of legal and illegal motives cannot be separated."
465 U.S. 822 (1984) Cited 206 times 9 Legal Analyses
Holding that a "lone employee's invocation of a right grounded in his collective-bargaining agreement is . . . a concerted activity in a very real sense" because the employee is in effect reminding his employer of the power of the group that brought about the agreement and that could be reharnessed if the employer refuses to respect the employee's objection
Rejecting an employer's proffered “affirmative defenses” for a disciplinary decision, in part, because “there was substantial evidence” that they were “pretextual”
Providing that in an administrative appeal, the agency "has all the powers which it would have in making the initial decision except as it may limit the issues on notice or by rule"