@inbook {GilKin03,
	title = {Numerical Issues Involved in Inverting Hessian Matrices},
	booktitle = {Numerical Issues in Statistical Computing for the Social Scientist},
	year = {2003},
	pages = {143-176},
	publisher = {John Wiley and Sons, Inc.},
	organization = {John Wiley and Sons, Inc.},
	chapter = {6},
	address = {Hoboken, NJ},
	author = {Jeff Gill and Gary King},
	editor = {Micah Altman and Michael P. McDonald}
}
