"This book concerns working hours - in the past and in the present, in America and in Britain. The focus is on the relationship between working hours and outcome , such as production and health. Proportional increases in working hours are shown to result in smaller proportional increases in production, and the benefits in output of long working hours may not offset the consequences of long hours for the health and quality of life of workers. A distinction is made between nominal hours (those that individuals are observed to be working) and effective hours (those that are effective in producing goods and that are compatible with good health). The meaning of the link between hours and average hourly earnings receives particular attention. Firms are encouraged to experiment with different hours.."

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