Scaled PCA: A New Approach to Dimension Reduction

Dashan Huang (), Fuwei Jiang (), Kunpeng Li (), Guoshi Tong () and Guofu Zhou ()
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Dashan Huang: Lee Kong Chian School of Business, Singapore Management University
Fuwei Jiang: School of Finance, Central University of Finance and Economics
Kunpeng Li: International School of Economics and Management, Capital University of Economics and Business
Guoshi Tong: Fanhai International School of Finance, Fudan University
Guofu Zhou: Olin Business School, Washington University in St. Louis

No 678, CEMA Working Papers from China Economics and Management Academy, Central University of Finance and Economics

Abstract: This paper proposes a novel supervised learning technique for forecasting: scaled principal component analysis (sPCA). The sPCA improves the traditional principal component analysis (PCA) by scaling each predictor with its predictive slope on the target to be forecasted. Unlike the PCA that maximizes the common variation of the predictors, the sPCA assigns more weight to those predictors with stronger forecasting power. In a general factor framework, we show that, under some appropriate conditions on data, the sPCA forecast beats the PCA forecast, and when these conditions break down, extensive simulations indicate that the sPCA still has a large chance to outperform the PCA. A real data example on macroeconomic forecasting shows that the sPCA has better performance in general.

Pages: 18 pages
Date: 2022
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Citations: View citations in EconPapers (13)

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Journal Article: Scaled PCA: A New Approach to Dimension Reduction (2022)
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