of the person concerned, the time curve during the life being called the carrfier. The carrier will, of course, depend to some extent on the education, so that we have a link with the element from which we started. Can we assume that the hierarchy of grades evolves on known patterns leading to skew distributions? Such a pattern would result from a general consideration of the growing complication of society. As a result of scientific and technological developments the amount of information which must be held in store ready for use increases steadily. This leads to specialization; Here or there a specialist splits off from a qualification because the information cannot be managed any more, it has to be divided. The specialist usually will represent a higher grade than the qualification from which^ splits off. If specialists are generated as in a birth process, each grade bringing forth new specialists one grade higher in proportion to the parent population of each grade then we should obtain the logarithmic growth characteristic of the diffusion processes in economics. In addition wd require as a Second assumption that, growing pyramids (or hierarchies) of the type described exist at/different ages/- in different stage^/of develop ment - one beside the/other at the same tijrfe; and further