Het duopoliemodel van van der weel

Summary In a recent article in this journal (1970, pp. 458–490) Van der Weel has developed a duopoly model founded on the thesis that the reaction functions of the duopolists can be derived from the profit maximization hypothesis and that, therefore, the set of equilibrium prices is determined endogeneously. The authors argue that this conception is not justified and that both the static and dynamic versions of the model are based on a reaction pattern in the sense of Launhardt.     

Berekening van den omvang der werkloosheid als gevolg van prijsdaling in een gesloten economisch milieu

Dit artikel is een onderdeel van een meer uitvoerige studie getiteld De labilisatie van het economisch leven en de middelen ter bestrijding. De noodzakelijkheid van een rationeel geldstelsel, welke binnenkort bij de N.V. H. D. Tjeenk Willink & Zoon te Haarlem zal verschijnen. 1n) Het eerst vermeld in zijn in 1803 verschenen Traité d'Economie politique, Chap. 15. Voor verdere literatuuropgave zie o.a.Dr. Leonhard Miksch, Gibt es eine allgemeine Ueberproduktion ? Gustav Fisher, 1929.     

Modellen en vooroordelen: Het artikel van Prof. Dr. J. Pen

Summary The author points out that the review article of Schouten's new book by J. Pen (see De Economist 1968, nr. 1, p. 16) is largely based on misapprehensions, and he refutes Pen's objections. Schouten pursues primarily an integration of monetary and non-monetary growth and trade cycle theories.Volume I is devoted to the trade cycle in a growing economy, and the conclusion drawn from the analysis is that a complete stabilization of the cycle is usually impossible. Schouten points out that, in times of structural inflation, an advanced anti-boom policy will be more effective than the conventional anti-recession policy. Furthermore, he believes that a combination of wage and investment policies is better than the traditional fiscal policy.Volume II treats the structural aspects. It is mainly concerned with the costs of structural policy, and with the problem of the possibilities and impossibilities of such a policy. Here, too, it is concluded that a co-ordination of wage and investment policies is the most important instrument.