@article{Kiefer2007,
	title = {A simulation estimator for testing the time homogeneity of credit
	rating transitions},
	author = {Nicholas M. Kiefer and C. Erik Larson},
	journal = {Journal of Empirical Finance},
	month = {Dec},
	number = {5},
	pages = {818--835},
	url = {http://www.sciencedirect.com/science/article/B6VFG-4KYXHRB-1/1/50d96c0263088494d8bb51fec20a99f3},
	volume = {14},
	year = {2007},
	biburl = {http://www.bibsonomy.org/bibtex/2f09923f7d01edc43f23f9fac97259f0b/smicha},
	keywords = {Ratings transitions }
}