Papers › Probabilistic Targeted Factor Analysis
Probabilistic Targeted Factor Analysis
Miguel C. Herculano, Santiago Montoya-Blandón
We develop a probabilistic variant of Partial Least Squares (PLS) we call Probabilistic Targeted Factor Analysis (PTFA), which can be used to extract common factors in predictors that are useful to predict a set of predetermined target variables. Along with the technique, we provide an efficient expectation-maximization (EM) algorithm to learn the parameters and forecast the targets of interest. We develop a number of extensions to missing-at-random data, stochastic volatility, factor dynamics, and mixed-frequency data for real-time forecasting. In a simulation exercise, we show that PTFA outperforms PLS at recovering the common underlying factors affecting both features and target variables delivering better in-sample fit, and providing valid forecasts under contamination such as measurement error or outliers. Finally, we provide three applications in Economics and Finance where PTFA outperforms compared with PLS and Principal Component Analysis (PCA) at out-of-sample forecasting.
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