Decreasing absolute risk aversion : some clarification
La Vallée (1968), in the expected utility model, gives a sufficient condition for positivity of the bid-selling spread. In this article, we show that this sufficient condition, namely decreasing absolute risk aversion (DARA) is in fact necessary. Moreover, we prove that the expected utility hypothesis and differentiability of the utility function are not required.
|Date of creation:||Mar 2008|
|Date of revision:|
|Contact details of provider:|| Postal: 106-112 boulevard de l'Hôpital 75 647 PARIS CEDEX 13|
Phone: + 33 44 07 81 00
Fax: + 33 1 44 07 83 01
Web page: http://centredeconomiesorbonne.univ-paris1.fr/
More information through EDIRC
When requesting a correction, please mention this item's handle: RePEc:mse:cesdoc:b08024. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Lucie Label)
If references are entirely missing, you can add them using this form.