UCM Procedure OverviewGetting StartedSyntaxDetailsExamplesReferences Examples: UCM Procedure Subsections: 41.1 The Airline Series Revisited 41.2 Variable Star Data 41.3 Modeling Long Seasonal Patterns 41.4 Modeling Time-Varying Regression Effects 41.5 Trend Removal Using the Hodrick-Prescott Filter 41.6 Using Splines to Incorporate Nonlinear Effects 41.7 Detection of Level Shift 41.8 ARIMA Modeling 41.9 Extracting A Business Cycle 41.10 A Transfer-Function Model for the Italian Traffic Accident Data Last updated: June 19, 2025