“…This line of research has quite some history for equity premium prediction and has developed established indicators, such as the short-term interest rate, the credit and the term spread (see, e.g., Ang & Bekaert, 2007;Fama & French, 1989; Keim & Stambaugh, 1986), the inflation rate (e.g., Campbell & Vuolteenaho, 2004;Fama & Schwert, 1977;Nelson, 1976), stock market volatility (investigated by Guo, 2006), or the consumption-wealth ratio provided by Lettau and Ludvigson (2001), to name just a few. Most of the empirical studies (e.g., Campbell & Shiller, 1988;Cochrane, 2008;Lewellen, 2004) use valuation ratios such as the dividend yield, the price-earnings ratio, or the book-to-market ratio, which should serve as proxies for expected business conditions, as mentioned by Campbell and Diebold (2009).…”