The paper investigates comparative statics effects of changes in uncertainty for a general family of problems that encompasses both the portfolio and saving decisions. Conditions are derived on preferences that are necessary and sufficient for unambiguous comparative statics predictions. The...

The decision model with two choice variables and two random variables, an extension of Feder, or Just and Pope, is examined here. Under the mean-standard deviation framework we derive the comparative statics results concerning the effects of a change in the mean, variance and covariance of the...