@article{King2001,
author = {King, G. and Zeng, L.},
title= {Explaining rare events in international relations},
year = {2001},
doi = {10.1162/00208180152507597},
URL = {http://gking.harvard.edu/files/abs/baby0sabs.shtml},
journal = {International Organization},
volume = {55},
number = {3},
pages = {693--715},
}