@article {WinSigKin95,
	title = {A Correction for an Underdispersed Event Count Probability Distribution},
	journal = {Political Analysis},
	year = {1995},
	pages = {215{\textendash}228},
	abstract = {We demonstrate that the expected value and variance commonly given for a well-known probability distribution are incorrect. We also provide corrected versions and report changes in a computer program to account for the known practical uses of this distribution.},
	author = {Rainer Winkelmann and Signorino, Curtis and Gary King}
}
