Recent research suggests that the power law is one of the most universal laws in nature and it also seems to work quite fine in economics and finance. In this paper we show that the power law explains extremely well the relationship between the value of broad-based market indices and their...

Analysts providing more accurate earnings forecasts also issue more profitable recommendations. We demonstrate how investors can profit from this contemporaneous link by differentiating between "able" and "lucky" analysts. In line with previous studies, we find that past track records alone are...

We document that investors can actually profit from the contemporaneous link between earnings accuracy and recommendation profitability (Loh and Mian (2006)). Differentiating between "able" and "lucky" analysts we suggest an implementable, i.e. look-ahead bias free, trading strategy that yields...

The distinction between stationarity, difference stationarity, deterministic trends as well as between short- and long-range dependence has a major impact on statistical conclusions, such as confidence intervals for population quantities or point and interval forecasts. In this paper, recent...