Beta coefficients may differ if you obtain them from different sources. These discrepancies occur because various sources use different time
periods or a different measure of the market when calculating beta coefficients. Using different sources, obtain the betas for the same companies in Exhibit 8.1 and compare with the betas you obtained in the previous assignment. Are the numerical values of the betas different? Possible sites include.

Google finance (www.google.com/finance)

Reuters (www.reuters.com)

MSN Money (www.msn.com).

Your school may subscribe to services such as Mergent Online (www.mergent.com), in which case you may also use those sources.