369 U.S. 736 (1962) Cited 712 times 29 Legal Analyses
Holding that "an employer's unilateral change in conditions of employment under negotiation" is a violation of the National Labor Relations Act because "it is a circumvention of the duty to negotiate"
440 U.S. 301 (1979) Cited 228 times 20 Legal Analyses
Holding that a union's request for employee aptitude tests was relevant to its claim, but employer's interest in preserving confidentiality was also legitimate, and disclosing the information only upon the employee's written consent was a reasonable accommodation
Holding that active supervision unnecessary where challenged ordinance left defendants, car rental companies at Denver International Airport, virtually no discretionary authority in setting and collecting usage fees from their customers because usage fee determined by detailed formula
356 U.S. 342 (1958) Cited 296 times 1 Legal Analyses
Holding employer's insistence on a ballot clause was an unfair labor practice under § 8 because it was a non-mandatory subject of bargaining and it "substantially modifies the collective-bargaining system provided for in the statute by weakening the independence of the 'representative' chosen by the employees. It enables the employer, in effect, to deal with its employees rather than with their statutory representative."