Enkele opmerkingen over Index-cijfers

Naar aanleiding van: The Making of Index Numbers by Irving Fisher (526 blz.). A Study of their Varieties, Tests and Reliability. Published by Houghton Mifflin Company for the Pollak Foundation for Economic Research. 1923. Boston and New-York.     

Enkele opmerkingen over groeimodellen

Summary In this article some aspects of growth models are considered. After an introduction on the subject-matter of growth theory, the standard growth models are discussed at some length from the point of view of equilibrium as well at disequilibrium dynamics. An attemptis made to discover the implicit assumptions that are made with respect to the behaviour pattern of consumers and producers who govern the actual path of a process of economic growth. It appears to be useful to distinguish demand-orientated and supply-orientatated aspects of growth models. The third part of the paper deals briefly with the dynamics of the dynamic models. The reaction pattern of the individuals who cope with a situation of disequilibrium comes to the fore in a more subtle way than in case of equilibrium dynamics. One of the main conclusions of the article is that the growth models under discussion seem to start from a behaviour pattern of producers that is either compatible with perfect competition or based on an investment decision that plays a role in the macro-economic adjustment mechanism but which lacks a microeconomic justification.      

Enkele opmerkingen over het tijdaspect der economische verschijnselen

Summary After a brief introduction the author starts by a short dogmatichistorical note of the exogene and endogene concepts of time as used in economic science among others by Barre and Norro. Exogene time is interpreted as the abstract frame within which adaptation of economic variables can take place; endogene time is defined as the periods of time as experiencedin concreto by human subjects. Using the endogene concept of time in an economic analysis means that the analysis can be extended to the wider structural field in which the economic phenomenon one wishes to study is situated in concrete chronological order as experienced in reality.The author tries to show that by introducing the time factor in the analysis as happens in dynamic economics the exogene and endogene time elements are both incorporated in economic theory. This means that the analysis is extended not only to the time element which gives room for inter-periodical adaptation, but also that the economic phenomena can be shown in the perspective, opened by the broadening of the field in which they appear in reality, as happens with regard to certain theories of economic growth.In the author's opinion this shows that extending an economic analysis to the time element ought to be done not only by adding this factor as if it were a mere complementary entity. Time spans reality in its entirety; one cannot cut it into pieces within reality's modal (economic) sphere. Therefore, the introduction of the time element into economic analysis implies an approach towards understanding the continual progress as shown in the reality sector, but also towards understanding the connection between economic and other aspects of reality.Gaarne betuigt schrijver dezes zijn erkentelijkheid jegens Prof. dr. T. P. van der Kooy en Prof. dr. F. de Roos, hoogleraren aan de Vrije Universiteit te Amsterdam, voor hun bereidwilligheid deze bijdrage in ontwerp door te nemen en voor de nuttige suggesties door hen gedaan.     

Enkele aspecten van de selectie van investeringen in een produktie-huishouding

Dit artikel is de vrucht van een in de sfeer van het investeringsbeleid gevoerde discussie. Het behandelt een probleem, dat in de paraktijk tot moeilijkheden aanleiding kan geven.