https://bigthink.com/politics-current-affairs/ibm-ageism?rebelltitem=1#rebelltitem1
ProPublica published an extensive report stating that IBM:
Denied older workers information the law says they need in order to decide whether they've been victims of age bias, and required them to sign away the right to go to court or join with others to seek redress.
Targeted people for layoffs and firings with techniques that tilted against older workers, even when the company rated them high performers. In some instances, the money saved from the departures went toward hiring young replacements.
Converted job cuts into retirements and took steps to boost resignations and firings. The moves reduced the number of employees counted as layoffs, where high numbers can trigger public disclosure requirements.
Encouraged employees targeted for layoff to apply for other IBM positions, while quietly advising managers not to hire them and requiring many of the workers to train their replacements.
Told some older employees being laid off that their skills were out of date, but then brought them back as contract workers, often for the same work at lower pay and fewer benefits.