Pastor, L.; Stambaugh, R.F. - Rodney L. White Center for Financial Research, Wharton … - 1998
Costs of equity for individual firms are estimated in a Bayesian analysis framework using several factor-based pricing … mispricing precluded, even for a stock whoses average return departs significantly from the pricing model's prediction …. Uncertainty about which pricing model to use is less important, on average, than within-model parameter uncertainty. …