This paper provides an early warning indicator for bubbles in financial markets. The indicator is based on traditional unit root tests, more precisely on the augmented Dickey-Fuller test and may be used in a repeated manner with rolling samples. The performance of the indicator is tested...

The dividend yield ratio in the stock markets is, to an extent, comparable to the rent-price ratio in the housing market. Taking advantage of this definitional similarity, one can then use the traditional unit root test for log dividend yield – in this case, the log rent-price ratio – to...