The process of removing recurrent and periodic variations over the course of a year. Also called deseasonalizing the data. Seasonal adjustments are discussed in Armstrong (2001c).<o:p></o:p></P>
 <ul>
   <li>Armstrong, J. S. (2001c), “Extrapolation for time-series 
and cross-sectional data,” in J. S. Armstrong (ed.), <I>Principles of 
Forecasting</I>. Norwell, MA: Kluwer Academic Press.</li>
 </ul>