@inproceedings{minka2003the,
author = {Minka, Tom},
title = {The 'Summation Hack' as an Outlier Model},
year = {2003},
month = {August},
abstract = {The ‘summation hack’ is the ad-hoc replacement of a product by a sum in a probabilistic expression. This hack is usually explained as a device to cope with outliers, with no formal derivation. This note shows that the hack does make sense probabilistically, and can be best thought of as replacing an outlier-sensitive likelihood with an outlier-tolerant one. This interpretation exposes the hack as an assumption about the outliers, allowing us to determine when it makes sense to use the hack.},
url = {http://approjects.co.za/?big=en-us/research/publication/summation-hack-outlier-model/},
}