@article {18574,
	title = {Will Joint Regional Air Pollution Control be More Cost-effective? An Empirical Study of China{\textquoteright}s Beijing-Tianjin-Hebei Region},
	journal = {Journal of Environmental Management},
	volume = {149},
	year = {2015},
	pages = {27-36},
	author = {Dan Wu, Yuan Xu, Shiqiu Zhang}
}
