Are downsizing and early retirement considered as forms of ageism?

Early retirement, also known as forced retirement, is considered ageism. Companies force seniors to leave their job, not because of incapability but their age. However, downsizing is a permanent reduction of a company’s incapable and unproductive staff regardless of age. But, indeed, seniors are mostly subjected to downsizing because of the common belief of older workers’ uselessness. In this case, it’s regarded as ageism.