Eine andere graphische Methode zur Erklärung der Nachfragereaktion bei konkurrierenden Gütern

The subject of a new discussion on Giffen Goods has been the demand curve of H. Arndt. This demand curve is strictly speaking identical to Marshall's. Beyond the Marshallian analysis it is shown here graphically, how the change in the marginal utility of money due to a price variation influences the good's marginal utility in money terms, and how the new equilibrium is established. For competitive goods this method shows in a straightforward fashion that inferiority is not the necessary condition for the non-normal demand reaction. For many of these goods it may occur only because of a great difference in prices. The Giffen case is a special case of the non-normal reaction and the usual explanation does not suffice.