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explained by educational investment clone* Quite 
evidently, there are other forces, too, which lead to 
a diffusion of incomes* we have to think only of the 
emergence of more end more elevated managers and 
nupernanagoro, of the specialisation of skills and 
aptitudes (doctors, scientists, engineers) and of 
the rise of some sportsmen as well as actors, singers 
and painters to the highest ranges of the income scale# 
Whet or® the forces at work here? to the one hand wo 
have the growing scale and complexity of organisations 
in our society - industrial concerns, hospitals and 
health services, schools and universities, government 
agencies of oil kinds - which involve the growth of 
managerial hierarchies - pyramids of increasing height. 
Hext we have the differentiations of skills resulting 
from the growing complexity of our techniques. Finally 
we have the growth of the mass media (films, gramophone 
records, broadcasting and television, magazines, mass- 
circulation papers, sports and show business) which has 
enormously increased the public which a oucessful star 
can reach in one performance. 2?his removes the constraints 
against a diffusion of income (in a society lacking the 
feudal maecenas) and produces larger and larger top 
stars.