We use high frequency data for the mark/dollar exchange rate for the period 1992-1995 to evaluate the effects of interventions. We estimate an unobserved components model that decomposes volatility into non-stationary and stationary parts. Stationary components in turn are decomposed into...

In this paper we test for the existence of long memory and structural breaks in the realized variance process for the DM/US$ and Yen/US$ exchange rates. While long memory is evident in the actual processes, a structural break analysis reveals that this feature is partially explained by...