Demographic trends, the dividend-price ratio, and the predictability of long-run stock market returns

This paper documents the existence of a slowly evolving trend in the log dividend-price ratio, DPt , determined by a demographic variable, MYt: the middle-aged to young ratio. Deviations of DPt from this long-run component explain transitory but persistent fluctuations in stock market returns. The relation between MYt and DPt is a prediction of an overlapping generation model. The joint significance of MY and DPt in long-horizon forecasting regressions for market returns explains the mixed evidence on the ability of DPt to predict stock returns and provide a model-based interpretation of statistical corrections for breaks in the mean of this financial ratio.