ABSTRACT
This is actually the first time within the Stockholm School that someone not only shows that the definition of the length of the period is a theoretical problem (cp. sect.IV:2:2), but also hints at the relation between fixed plans and the length of the period. After Hammarskjtlld, it was almost always
"I assume the existence of a period of time, to be called a 'day', which is finite but nevertheless so short that the income which a man receives on a given day cannot be allocated during its course to any particular use" (Robertson 1933, p.47).
