How to Identify and analyse the factors that can affect the reliability of a firm's beta. How the recent global financial crisis has had an impact on a firm's beta, its cost of equity and its cost of capital? What are the likely implications, for both the firm and its providers of capital?
Please provide reference and examples for further reading and learning. The explanation should have about 500 words, but it is the quality of the answer that matters, not the number of words.