Potential pitfalls

• There’s no guarantee every worker will be equally productive during a shorter day, especially for less committed workers. 
• A shorter workday for multinational companies in some industries could also interfere with the overlap among time zones.
• There may be hidden costs to employers, such as hiring more employees to make up for the need.
• There’s also a danger that shortening the workday won’t actually change how much people work.

Eight-hour workdays are standard for many industries – and this structure is hard to change. Everyone thinks of work as five days a week, eight hours a day. But, the lack of evolution is a failure of imagination, not actually measuring people's results. 

Studies show working longer does not...