A Regularized Competition Model for Question Difficulty Estimation in Community Question Answering Services Quan Wang author Jing Liu author Bin Wang author Li Guo author 2014-10 text Proceedings of the 2014 Conference on Empirical Methods in Natural Language Processing (EMNLP) Alessandro Moschitti editor Bo Pang editor Walter Daelemans editor Association for Computational Linguistics Doha, Qatar conference publication wang-etal-2014-regularized 10.3115/v1/D14-1118 https://aclanthology.org/D14-1118/ 2014-10 1115 1126