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speculative bubbles and/or noise trading behavior. Our empirical findings for the US stock market covering the 1871:1 - 2000 …
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A nonstationary dividend yield, having a unit root, is seen as proof of bubbles (Craine 1993). This inference is not … equilibrium dividend yield is a random walk without a deterministic trend or drift, but bubbles are still absent … valid. A sufficient condition for the absence, respectively presence of bubbles is the uniform divergence, respectively …
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