This data set summarizes betas and unlevered betas, by industry. The cash adjusted unlevered beta takes out the effect of the cash balances on unlevered betas. It is based on the assumption that cash has a beta of zero. Data Used: Value Line database, of 5586 firms
This is a chapter inside a long study (by Esa Mäkeläinen). Please click the corresponding chapter number (3.1.3 in this case) from the table of contents after you have chosen this link.
Link contains two papers: one on M&M's implications on the relation between equity and debt and the other on how to generate the WACC curve