Lettau, Martin; Nieuwerburgh, Stijn Van - In: Review of Financial Studies 21 (2008) 4, pp. 1607-1652
Evidence of stock-return predictability by financial ratios is still controversial, as documented by inconsistent results for in-sample and out-of-sample regressions and by substantial parameter instability. This article shows that these seemingly incompatible results can be reconciled if the...