There has been mixed evidence regarding the existence of rational bubbles in the foreign exchange markets. Standard unit root and cointegration tests are criticized for their low power to detect rational bubbles that periodically collapse. This paper introduces recently developed sequential unit...

We investigate the extent to which the effect of the 2018/2019 US import tariff hikes on US (post-tariff) import prices was offset by the concurrent appreciation of the US dollar and trace the source of the appreciation back to US trade policy itself. The dollar response to trade policy...

We explore whether modelling parameter time variation improves the point, interval and density forecasts of nine major exchange rates vis-a-vis the US dollar over the period 1976-2015. We find that modelling parameter time variation is needed for an accurate calibration of forecast confidence...