Unsurprisingly, the older an unemployed worker is, the more likely he or she is to be unemployed for a long period. Employers want younger workers and are hiring them first, if they're hiring at all. See the Business Insider article (scroll down).
On the one hand, workers no longer spend decades with one employer so why should the employer care about their age? On the other hand, younger workers are more likely to be healthy, flexible and up-to-date technologically. It appears these latter arguments are persuasive.