Morana, C. - In: Applied Economics Letters 9 (2002) 11, pp. 745-748
This article shows how IGARCH effects can arise as an artifact of unaccounted structural change. Using daily returns for the DM/US$ and Yen/US$ exchange rates, the finding is shown to have empirical relevance. GARCH models appear to be useful approximations, for short-term forecasting, to a data...