Three concepts: stochastic discount factors, multi-beta pricing and mean variance efficiency, are at the core of modern empirical asset pricing. This paper reviews these paradigms and the relations among them, concentrating on conditional asset pricing models where lagged variables serve as...

Micro-cap stocks, a subset of small stocks, have the potential to provide additional diversification benefits and increased returns to investors. The ways that micro-cap stocks can contribute to investors' actual portfolios have not been rigorously investigated. In this study, we examine...