What can explain the persistent fluctuations observed in non-fixed exchange rates? We use a version of the Kareken-Wallace two-country overlapping generations model to explain this empirical phenomenon. The agents use an adaptive learning rule to forecast expected prices in both countries...

When estimates of variances are used to make asset allocation decisions, underestimates of population variances lead to lower expected utility than equivalent overestimates: a utility based criterion is asymmetric, unlike standard criteria such as mean squared error. To illustrate how to...