The latest generation of Americans to enter the labor force may be reshaping the way the United States goes to work. Millennials are the generation who reached adulthood around the year 2000. And many of them do not have the usual 9-to-5 work mentality. The Millennial workforce wants to work a more flexible schedule. This could mean the end of the inflexible 40-hour work week. A professor at Florida International College of Law in Miami, Florida explains that Millennials value their free time. They value their personal lives their friends, hobbies and interests -- as much as they value work. That attitude may sound like a benefit to only the workers. But perhaps not. Professor Kerri Stone says studies show that reducing working hours can actually result in better workplace productivity. Stone says that after working so many hours per week you reach the point of what she calls, diminishing returns.