Perold (2007) shows that, given a diffuse prior that is being updated in light of a noisy market price, the posterior distribution says that value-weighting and equal-weighting one's portfolio makes no difference. We argue that the diffuse prior is hard to reconcile with reality and that a...

The stock price index is a thermometer reflecting changes in the stock market, and can convey key information on capital market dynamics and trends to investors. This paper empirically investigates the impact of index adjustments on corporate social responsibility performance by employing the...