Cross-Cultural Analysis of Blogs and Forums with Mixed-Collection Topic Models Michael Paul author Roxana Girju author 2009-08 text Proceedings of the 2009 Conference on Empirical Methods in Natural Language Processing Philipp Koehn editor Rada Mihalcea editor Association for Computational Linguistics Singapore conference publication paul-girju-2009-cross https://aclanthology.org/D09-1146/ 2009-08 1408 1417