It is noted in the article that inclusion of the notion «acme» (designating summits in the development and most productive periods of human life) in the active vocabulary of many people actualizes revealing of the specificity of his personal meanings and place of acme in the system of values....

This paper provides an axiomatic characterization of two rules for comparing alternative sets of objects on the basis of the diversity that they offer. The framework considered assumes a finite universe of objects and an a priori given ordinal quadernary relation that compares alternative pairs...

In the period before the second World War, the Dutch Bureau of Statistics had developed two sets of indicators ofunemployment in the Netherlands. One was based on statistical data of unemployment insurance funds of tradeunions and the other one on statistical data of labour exchanges. This paper...