Twenty-four hours a day is given to everyone equally. A work day with long hours implies a direct decrease in quality of life and also places a constraint on participating in other important activities outside of work. These constraints may directly lead to social exclusion and social justice problems, particularly between regions and or between social classes. Because there are obvious connections between time available for non-work activities and quality of life. Statistics Korea has been conducting a nationwide time use survey once every 5 years since 1999. The survey investigates individual time use and individual attitudes toward time use, which provides a framework measuring quality of life.

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