This is based on the Boeing 7E7 case study:

What are the appropriate defense firms to use for calculating the commercial division beta?

• Provide a table with the equity and asset betas for the defense firms used.Use the following guidelines when choosing betas. Case exhibit 10 provides several betas based on different market proxies and the time horizon and frequency (daily, weekly, monthly) that is used. You have to determine the appropriate proxy to use and the "best' time horizon and frequency.