Although average wages tend to be lower at younger companies in the U.S., workers aged 25–34 earn3.1% more at firms that are five years old or younger than at well-established firms, say Paige Ouimet of the University of North Carolina and Rebecca Zarutskie of the Federal Reserve Board. One reason may be that youthful workers possess the cutting-edge technical skills that startups are seeking and are willing to pay for, the researchers say. 25-to-34-year-old employees make up 27% of the workforces of young firms but just 18% of those at well-established firms (companies that have been around for two decades or more).
SOURCE: Who works for startups? The relation between firm age, employee age, and growth