Model-based estimates of future uncertainty are generally based on the in-sample fit of the model, as when Box-Jenkins prediction intervals are calculated. However, this approach will generate biased uncertainty estimates in real time when there are data revisions. A simple remedy is suggested,...

This paper argues that the relatively voluminous surviving records about foreign exchange (FX) rates in the Middle Ages can help to illuminate the much murkier question of medieval interest rates. We first explain how the medieval FX market operated and its links to the money market. Next, we...