Entscheidungsbedingte Kaufkraftverluste: Formen,Umfang und verbraucherpolitische Relevanz

Zusammenfassung Entscheidungsbedingte Kaufkraftverluste treten dann auf, wenn Verbraucher wegen beschränkter Markttransparenz Kaufentscheidungen treffen, die zu finanziellen Einbußen fürhren. Am Beispiel von drei verbraucherinformationspolitischen Maßnahmen werden Formen und Umfang entscheidungsbedingter Kaufkraftverluste herausgearbeitet. Vielleicht gelingt es, mit Hilfe dieser Kaufkraftverluste erste Auswahlkriterien und erste Ansätze einer Erfolgskontrolle im Rahmen der Verbraucherpolitik aufzuzeigen. Vielleicht gelingt es aber auch, dem Verbraucher den potentiellen finanziellen Schaden uninformierten Kaufentscheidungsverhaltens vor Augen zu führen, in der Hoffnung, daß er nun eher dazu motiviert ist, sich nicht nur bei extensiven Kaufentscheidungsprozessen informationsaktiver zu verhalten.

---

Monetary losses caused by uninformed purchase decisions: About their implications for consumer policy and various ways of calculating them

Frequently, the uninformed consumer makes buying decisions which differ from the decisions of the information seeker. Often, this takes the form of products with a higher price but not corresponding improvement of quality being chosen, or products with a lower quality but no corresponding reduction in price. In both cases, the uninformed consumer suffers a monetary loss (a loss in money income, Morris & Bronson, 1970).In this paper, three ways of calculating such a monetary loss are presented. Two of these are taken from the literature (Granger & Billson, 1972; Russo, 1977) and concern the calculation of real losses which result from the choice of unnecessarily expensive products, owing to difficulties in calculating and comparing unit prices, when stores do not make these extremely manifest. The third calculation concerns a more hypothetical entity, the potential loss that can be incurred by choosing the most expensive brand in a product class rather than the cheapest of those brands which have been rated as very good by the German product-testing agency Stiftung Warentest. In turns out that these potential losses are oftentimes very large. The author is of the opinion that the relative size of these losses can be used for selecting those classes of products where the need for consumer actions, above all for information about prices and qualities, is particulary urgent. Furthermore, the efficiency of such actions can be measured in terms of changes in the size of the losses. The consumers themselves might also be induced towards more extensive pre-purchase search, were they made aware of the size of these potential losses.

---

---

Udo Beier ist Professor für Wirtschaftslehre des Haushalts und Verbraucherpolitik an der Universität Hamburg, Fachbereich Erziehungswissenschaft, Von-Melle-Park 8, D-2000 Hamburg 13.