This paper considers seasonality in Australian macroeconomic time series, emphasizing the roles of unit roots and the selection of differencing filters. The consequences of seasonal unit roots and the importance of correct variable transformation are analyzed. For certain variables, in addition...

Real non-durable consumption expenditure for many countries typically exhibits substantial seasonal fluctuations. In this paper, two seasonal models that are consistent with an extension of the rational expectations life-cycle permanent income hypothesis are evaluated using quarterly seasonally...