ABSTRACT
This chapter surveys recent and possible future research issues in modeling economic time series with seasonality. There is a growing interest in modeling seasonality and not in removing it through some seasonal adjustment methods. In areas as marketing and tourism, seasonality itself is the focus of investigation. ln macroeconomics there is a tendency to apply Census X-ll type methods to remove seasonality. However, recent empirical studies have shown the large number of drawbacks of seasonally adjusted data. Furthermore, other studies have shown that it is not that difficult to model seasonality explicitly.
