The factor of distance may also stand for an index of information about export markets. - Jan Tinbergen

Educational policies deserve to be programmed not only with a view to improving education in the widest sense, but also in order to ináuence the income distribution.

It is also our hope that the interpretation of the socio-economic optimum as a set of institutions may help to get under way a discussion of a more scientific character than was usual so far about the relative merits of various existing socio-economic orders, especially those of Eastern and Western Europe, including such interesting cases as Sweden, Switzerland and Yugoslavia. A considerable amount of better information about various types of external effects will be one of the necessary ingredients if we want to give concrete content to such merit rating of various systems.

Models constitute a framework or a skeleton and the flesh and blood will have to be added by a lot of common sense and knowledge of details.