@inbook{Allison2006,
author = {Allison, P.D. and Christakis, N.A.},
title= {Fixed effects methods for the analysis of nonrepeated events},
year = {2006},
editor = {Stolzenberg, R.M.},
booktitle = {Sociological Methodology 2006},
address = {Oxford, UK},
publisher = {Wiley-Blackwell},
pages = {155--172},
}