@article {king2007,
	title = {A },
	journal = {Journal of Policy Analysis and Management},
	volume = {26},
	year = {2007},
	pages = {479-506},
	author = {Gary King and Emmanuela Gakidou and Nirmala Ravishankar and Moore, Ryan T. and Jason Lakin and Manett Vargas and Mar and Eugenio Hern and Hern and Hern}
}
