ABSTRACT
Work is a signicant part of many people’s lives. Most adults spend a third to almost half their waking day at work,1,2 and global labor statistics indicate that the number of people employed has increased by half a billion over the past decade, with close to half or 3.1 billion of the world’s population being employed in 2010.3 Women now represent 40% of the global workforce and between 60% and 90% of the world’s part-time workers.4 Many people hold multiple jobs and work longer hours,5 and overtime, shift work, and unusual work hours are commonplace,6 as is delaying retirement to an older age.7 Modern occupational work is highly dynamic, pressurized, continually evolving, often subject to rapid change, and progressively more dependent on technological innovation and international markets.
