@article{Qian2008,
	title = {Nonlinear behaviour of the Chinese SSEC index with a unit root: Evidence
	from threshold unit root tests},
	author = {Xi-Yuan Qian and Fu-Tie Song and Wei-Xing Zhou},
	day = {15},
	journal = {Physica A: Statistical Mechanics and its Applications},
	month = {Jan},
	number = {2-3},
	pages = {503--510},
	url = {http://www.sciencedirect.com/science/article/B6TVG-4PT295N-8/1/f56d0a6dad60926dd4876373b69a490a},
	volume = {387},
	year = {2008},
	biburl = {http://www.bibsonomy.org/bibtex/23d449b5ef2a22c3f68e923712353d25f/smicha},
	description = {Physica A},
	keywords = {(TAR) Threshold autoregressive model }
}