Characterizing Myopic Intertemporal Demand
In the standard certainty multiperiod demand problem it is well-known that if a consumer's preferences are log additive (or equivalently Cobb-Douglas), demand in each period is myopic in the sense of being independent of future prices. As a result, less stringent informational requirements in terms of price expectations are imposed on the consumer. Given the general aversion of Fisher (1930), Hicks (1965) and Lucas (1978), among others, to requiring preferences to be additively separable, it is natural to ask whether myopia can hold for non-additive forms of utility.