@article{Dotan1984,
	title = {Variable versus stationary beta in the market model: A comparative analysis},
	author = {Amihud Dotan and Aharon Ofer},
	journal = {Journal of Banking \& Finance},
	month = {Dec},
	number = {4},
	pages = {525--534},
	url = {http://www.sciencedirect.com/science/article/B6VCY-4NC4NS2-2/1/832f8ec0cb2d97e193adf82121bc0148},
	volume = {8},
	year = {1984},
	biburl = {http://www.bibsonomy.org/bibtex/266a6a20b9a671695f89c495573327f02/smicha},
	description = {Journal of Banking & Finance},
	keywords = {imported }
}