For technical questions regarding estimation of single equations, systems, VARs, Factor analysis and State Space Models in EViews. General econometric questions and advice should go in the Econometric Discussions forum.
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Hi, I have an issue with the STL method to deseasonalize weekly data: I want to check whether the trend is accelerating or decelerating, so I look at the first difference, but it has strange spikes like those in the picture attached. Why does it happen? I checked with other series and it keep happening.
- err.png (12.79 KiB) Viewed 393 times
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