X-11/Y2k Quarterly Seasonal Adjustment (Census Method II) - Quick Tab

Select the Quick tab of the X-11/Y2k Quarterly Seasonal Adjustment (Census Method II) dialog box to access the options described here.

Element Name Description
Seasonal adjust The Seasonal adjust. group box contains two options: Additive and Multiplicative. Select an option to determine which type of seasonal adjustment will be performed (refer to X-11 census method II seasonal adjustment for details).
Additive Select the Additive option button to perform an additive seasonal adjustment. In short, in the additive model, the seasonal, trend-cycle, and irregular (random) components are assumed to combine in an additive fashion (e.g., the seasonal fluctuation adds $1,000,000 to the sales in the holiday month of December).
Multiplicative Select the Multiplicative option button to perform a multiplicative seasonal adjustment. In the multiplicative model, the seasonal, trend-cycle, and irregular (random) components are thought to combine in a multiplicative fashion (e.g., due to the seasonal component, in December sales increase by 30%, i.e., 1.3 times the baseline).
Dates (start of series) Use the options in the Dates (start of series) group box to determine the start date of the series. The start date not only affects the labeling of the output tables, but can also substantially affect the computations.
From variable Select the From variable option button to display the standard variable selection dialog box, in which you select the variable containing the starting date (i.e., the date stored in this variable in the first case of the respective series will be used as the start date of the series).
Variable Click the Variable button to display the standard variable selection dialog box, in which you select the variable containing the starting date.
From Quarter/Year Select the From Quarter/Year option button to specify the quarter and year in which the series starts.

Note: Specifying dates. You can enter either four-digit years in the range from 1901 through 2099, or two-digit years in the range from 0 through 99. If you specify a two-digit year less than 20, the respective year will be interpreted as 20xx, where xx stands for the two-digit year (e.g., 11 will be interpreted as 2011); if you specify a two-digit year greater than or equal to 20, then the year will be interpreted as 19xx, where xx stands for the two-digit year (e.g., 55 will be interpreted as 1955).