Random disturbances and the choice of exchange regimes in an intergenerational model

An overlapping generational model is used to derive the consumption demand for individuals of each generation under expected utility-maximizing behavior: these demand functions are used to derive macroeconomic equilibrium under fixed and flexible exchange rates. The standard aggregate results concerning the insulating role of flexible rates for real external disturbances and fixed rates for internal disturbances are shown. However, the variability of an individual's utility need not be the same as the variability of aggregate variables. It is shown that the form of the utility function and the sources of disturbances are crucial in determining which exchange regime is preferable.