Harvey’s hypercodes and the “Propogram” – More than 24 hours per day?

Author
Jonathan Gershuny

Keywords
Time use, childcare, multiple simultaneous activities

Abstract
In the 1980s, Harvey originated the key concept for the representation of multiple simultaneous activities without violating the constraint of the 24-hourday – the "hypercode". This implements his conceptual innovation in the context of childcare, and suggests a means of graphical representation.

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