When Estimating the Cost of Capital (Part I of III) In this paper, published in three parts with NACVA’s QuickRead, Roger Grabowski reviews the size effect, potential reasons why one observes the size effect, and correct common misconceptions and address criticisms of the Size Premia (SP). Throughout this paper, the author shows that using a pure market factor as the sole risk factor in estimating the expec ...

Measuring the Relative Performance of Small Stock vs. Large Stock and the Cost of Equity Roger Ibbotson and James Harrington discuss two different ways of measuring the relative performance of small stocks versus large stocks in this article: (i) the “small stock premium” and (ii) the “beta-adjusted size premium”. Ibbotson and Harrington demonstrate why using a non-beta-adjusted size premium within the cont ...