... the Association for Computational Linguistics:shortpapers, pages 24–29,Portland, Oregon, June 19-24, 2011.c2011 Association for Computational LinguisticsAn Empirical Investigation of Discountingin ... of documents, we consider testing on cor-pus pairs with varying degrees of domain difference.We construct additional corpora NYT96, NYT06,AFP95, AFP96, and AFP06, by taking 50M wordsfrom documents ... growingdiscounts when the train and test corpora are drawn1Gigaword is drawn from six newswire sources and containsboth miscellaneous text and complete, contiguous documents,sorted chronologically. Our...