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- 2018
Some Results on ?1 Polynomial Trend FilteringDOI: https://doi.org/10.3390/econometrics6030033 Keywords: ?1 trend filtering, Hodrick–Prescott filtering, Whittaker–Henderson method of graduation, Lasso regression, basis pursuit denoising, total variation denoising Abstract: Abstract ? 1 polynomial trend filtering, which is a filtering method described as an ? 1 -norm penalized least-squares problem, is promising because it enables the estimation of a piecewise polynomial trend in a univariate economic time series without prespecifying the number and location of knots. This paper shows some theoretical results on the filtering, one of which is that a small modification of the filtering provides not only identical trend estimates as the filtering but also extrapolations of the trend beyond both sample limits. View Full-Tex
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