Use Bloomberg (see access details).

• For Country equity risk premiums, hit the yellow <EQUITY> Key, then type CRP and hit the green <GO> key.
• For Company equity risk premiums, hit <EQUITY>, then type EQRP and hit <GO>.
• For additional company risk ratings, type the company's ticker symbol and hit the <EQUITY> key, then type RSKC and hit <GO>.

For annual Equity Risk Premiums from 1926 to date, use the Ibbotson SBBI Classic Yearbook, located at call number HG 4915 I362 at the Lippincott Library Reference Desk.