The UCM Procedure OverviewGetting StartedSyntaxDetailsExamplesReferences Examples: UCM Procedure Subsections: 42.1 The Airline Series Revisited 42.2 Variable Star Data 42.3 Modeling Long Seasonal Patterns 42.4 Modeling Time-Varying Regression Effects 42.5 Trend Removal Using the Hodrick-Prescott Filter 42.6 Using Splines to Incorporate Nonlinear Effects 42.7 Detection of Level Shift 42.8 ARIMA Modeling 42.9 Extracting A Business Cycle 42.10 A Transfer-Function Model for the Italian Traffic Accident Data Last updated: May 22, 2025