“…To examine the best methods to manage SBU and to determine whether the out-of-sample performance of equity premium predictive regression models can be improved by incorporating SBU, we discuss and compare five alternative methods that deal with SBU: the expanding window, the rolling window, the Bai-Perron method Perron, 2003, 1998), Robust Optimal Weights on Observations (Pesaran et al, 2013), and Forecast Combination across Estimation Windows (Pesaran and Timmermann, 2007;Tian and Anderson, 2014). We examine the performances of these methods for a broad range of bivariate prediction models that use common predictors in the literature, including 14 economic predictors (see Welch and Goyal, 2008;Rapach et al, 2010) and 14 indicators based on technical trading rules (see Neely et al, 2014), in addition to two "kitchen sink" prediction models based on these economic and technical predictors.…”