The SSPAN statement applies sliding spans analysis to determine the suitability of seasonal adjustment for an economic series.
The following options can appear in the SSPAN statement:
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NDEC= n
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specifies the number of decimal places shown on selected sliding span reports. This option has no effect on the precision
of the variables values in the OUTSPAN output data set.
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CUTOFF= value
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gives the percentage value for determining an excessive difference within a span for the seasonal factors, the seasonally
adjusted series, and month-to-month and year-to-year differences in the seasonally adjusted series. The default value is 3.0.
The use of the CUTOFF=value in determining the maximum percent difference (MPD) is described in the section Computational Details for Sliding Spans Analysis. Caution should be used in changing the default CUTOFF=value. The empirical threshold ranges found by the U.S. Census Bureau
no longer apply when value is changed.
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TDCUTOFF= value
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gives the percentage value for determining an excessive difference within a span for the trading-day factors. The default
value is 2.0. The use of the TDCUTOFF=value in determining the maximum percent difference (MPD) is described in the section
Computational Details for Sliding Spans Analysis. Caution should be used in changing the default TDCUTOFF=value. The empirical threshold ranges found by the U.S. Census Bureau
no longer apply when the value is changed.
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NOPRINT
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suppresses all sliding span reports. See Computational Details for Sliding Spans Analysis for more details on sliding span reports.
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PRINT
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prints the summary sliding span reports S 0 through S 6.E.
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PRINTALL
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prints the summary sliding spans report S 0 through S 6.E, along with detail reports S 7.A through S 7.E.