| 2026 | ECIR | Less LLM, More Documents: Searching for Improved RAG. | Jingjie Ning, Yibo Kong, Yunfan Long, Jamie Callan |
| 2026 | ICTIR | DeepResearchGym: A Free, Transparent, and Reproducible Sandbox for Deep Research. | Joo Coelho, Jingjie Ning, Jingyuan He, Kangrui Mao, Abhijay Sai Paladugu, Pranav Setlur, Jiahe Jin, Jamie Callan, Joo Magalhes, Bruno Martins, Chenyan Xiong |
| 2026 | SIGIR | Agentic Search in the Wild: Intents and Trajectory Dynamics from 14M+ Real Search Requests. | Jingjie Ning, Joo Coelho, Yibo Kong, Yunfan Long, Bruno Martins, Joo Magalhes, Jamie Callan, Chenyan Xiong |
| 2025 | SIGIR | Tevatron 2.0: Unified Document Retrieval Toolkit across Scale, Language, and Modality. | Xueguang Ma, Luyu Gao, Shengyao Zhuang, Jiaqi Samantha Zhan, Jamie Callan, Jimmy Lin |
| 2024 | ACL | Dwell in the Beginning: How Language Models Embed Long Documents for Dense Retrieval. | Joo Coelho, Bruno Martins, Joo Magalhes, Jamie Callan, Chenyan Xiong |
| 2024 | SIGIR | Generalizable Tip-of-the-Tongue Retrieval with LLM Re-ranking. | Lus Borges, Rohan Jha, Jamie Callan, Bruno Martins |
| 2023 | ACL | Precise Zero-Shot Dense Retrieval without Relevance Labels. | Luyu Gao, Xueguang Ma, Jimmy Lin, Jamie Callan |
| 2023 | ECIR | COILcr: Efficient Semantic Matching in Contextualized Exact Match Retrieval. | Zhen Fan, Luyu Gao, Rohan Jha, Jamie Callan |
| 2023 | EMNLP | Active Retrieval Augmented Generation. | Zhengbao Jiang, Frank F. Xu, Luyu Gao, Zhiqing Sun, Qian Liu, Jane Dwivedi-Yu, Yiming Yang, Jamie Callan, Graham Neubig |
| 2023 | ICML | PAL: Program-aided Language Models. | Luyu Gao, Aman Madaan, Shuyan Zhou, Uri Alon, Pengfei Liu, Yiming Yang, Jamie Callan, Graham Neubig |
| 2023 | ICTIR | CSurF: Sparse Lexical Retrieval through Contextualized Surface Forms. | Zhen Fan, Luyu Gao, Jamie Callan |
| 2023 | ICTIR | KALE: Using a K-Sparse Projector for Lexical Expansion. | Lus Borges, Bruno Martins, Jamie Callan |
| 2023 | ICTIR | Conversational Search with Random Walks over Entity Graphs. | Gustavo Gonalves, Joo Magalhes, Jamie Callan |
| 2023 | SIGIR | Tevatron: An Efficient and Flexible Toolkit for Neural Retrieval. | Luyu Gao, Xueguang Ma, Jimmy Lin, Jamie Callan |
| 2022 | ACL | Unsupervised Corpus Aware Language Model Pre-training for Dense Passage Retrieval. | Luyu Gao, Jamie Callan |
| 2022 | EMNLP | Retrieval as Attention: End-to-end Learning of Retrieval and Reading within a Single Transformer. | Zhengbao Jiang, Luyu Gao, Zhiruo Wang, Jun Araki, Haibo Ding, Jamie Callan, Graham Neubig |
| 2022 | SIGIR | Long Document Re-ranking with Modular Re-ranker. | Luyu Gao, Jamie Callan |
| 2022 | SIGIR | ClueWeb22: 10 Billion Web Documents with Rich Information. | Arnold Overwijk, Chenyan Xiong, Jamie Callan |
| 2021 | CIKM | Improving Query Representations for Dense Retrieval with Pseudo Relevance Feedback. | HongChien Yu, Chenyan Xiong, Jamie Callan |
| 2021 | ECIR | Assessing the Benefits of Model Ensembles in Neural Re-ranking for Passage Retrieval. | Lus Borges, Bruno Martins, Jamie Callan |
| 2021 | ECIR | Rethink Training of BERT Rerankers in Multi-stage Retrieval Pipeline. | Luyu Gao, Zhuyun Dai, Jamie Callan |
| 2021 | ECIR | Complement Lexical Retrieval Model with Semantic Residual Embeddings. | Luyu Gao, Zhuyun Dai, Tongfei Chen, Zhen Fan, Benjamin Van Durme, Jamie Callan |
| 2021 | ECIR | PGT: Pseudo Relevance Feedback Using a Graph-Based Transformer. | HongChien Yu, Zhuyun Dai, Jamie Callan |
| 2021 | EMNLP | Condenser: a Pre-training Architecture for Dense Retrieval. | Luyu Gao, Jamie Callan |
| 2021 | NAACL | COIL: Revisit Exact Lexical Match in Information Retrieval with Contextualized Inverted List. | Luyu Gao, Zhuyun Dai, Jamie Callan |
| 2020 | CIKM | Generating Categories for Sets of Entities. | Shuo Zhang, Krisztian Balog, Jamie Callan |
| 2020 | CIKM | Ranking Clarification Questions via Natural Language Inference. | Vaibhav Kumar, Vikas Raunak, Jamie Callan |
| 2020 | ECIR | Rethinking Query Expansion for BERT Reranking. | Ramith Padaki, Zhuyun Dai, Jamie Callan |
| 2020 | EMNLP | Modularized Transfomer-based Ranking Framework. | Luyu Gao, Zhuyun Dai, Jamie Callan |
| 2020 | EMNLP | Making Information Seeking Easier: An Improved Pipeline for Conversational Search. | Vaibhav Kumar, Jamie Callan |
| 2020 | ICTIR | Understanding BERT Rankers Under Distillation. | Luyu Gao, Zhuyun Dai, Jamie Callan |
| 2020 | WWW | Context-Aware Document Term Weighting for Ad-Hoc Search. | Zhuyun Dai, Jamie Callan |
| 2020 | SIGIR | CAsT-19: A Dataset for Conversational Information Seeking. | Jeffrey Dalton, Chenyan Xiong, Vaibhav Kumar, Jamie Callan |
| 2020 | SIGIR | Summarizing and Exploring Tabular Data in Conversational Search. | Shuo Zhang, Zhuyun Dai, Krisztian Balog, Jamie Callan |
| 2020 | SIGIR | Context-Aware Term Weighting For First Stage Passage Retrieval. | Zhuyun Dai, Jamie Callan |
| 2020 | SIGIR | Efficiency Implications of Term Weighting for Passage Retrieval. | Joel M. Mackenzie, Zhuyun Dai, Luke Gallagher, Jamie Callan |
| 2019 | WWW | Local Matching Networks for Engineering Diagram Search. | Zhuyun Dai, Zhen Fan, Hafeezul Rahman, Jamie Callan |
| 2019 | SIGIR | Deeper Text Understanding for IR with Contextual Neural Language Modeling. | Zhuyun Dai, Jamie Callan |
| 2019 | WSDM | Modeling Temporal Evidence from External Collections. | Flvio Martins, Joo Magalhes, Jamie Callan |
| 2018 | ECIR | Inverted List Caching for Topical Index Shards. | Zhuyun Dai, Jamie Callan |
| 2018 | ICTIR | Measuring the Effectiveness of Selective Search Index Partitions without Supervision. | Yubin Kim, Jamie Callan |
| 2018 | ICTIR | A Vertical PRF Architecture for Microblog Search. | Flvio Martins, Joo Magalhes, Jamie Callan |
| 2018 | SIGIR | Dynamic Shard Cutoff Prediction for Selective Search. | Hafeezul Rahman Mohammad, Keyang Xu, Jamie Callan, J. Shane Culpepper |
| 2018 | SIGIR | Consistency and Variation in Kernel Neural Ranking Model. | Mary Arpita Pyreddy, Varshini Ramaseshan, Narendra Nath Joshi, Zhuyun Dai, Chenyan Xiong, Jamie Callan, Zhiyuan Liu |
| 2018 | SIGIR | Towards Better Text Understanding and Retrieval through Kernel Entity Salience Modeling. | Chenyan Xiong, Zhengzhong Liu, Jamie Callan, Tie-Yan Liu |
| 2018 | WSDM | Convolutional Neural Networks for Soft-Matching N-Grams in Ad-hoc Search. | Zhuyun Dai, Chenyan Xiong, Jamie Callan, Zhiyuan Liu |
| 2017 | CIKM | JointSem: Combining Query Entity Linking and Entity based Document Ranking. | Chenyan Xiong, Zhengzhong Liu, Jamie Callan, Eduard H. Hovy |
| 2017 | WWW | Explicit Semantic Ranking for Academic Search via Knowledge Graph Embedding. | Chenyan Xiong, Russell Power, Jamie Callan |
| 2017 | SIGIR | Learning To Rank Resources. | Zhuyun Dai, Yubin Kim, Jamie Callan |
| 2017 | SIGIR | DBpedia-Entity v2: A Test Collection for Entity Search. | Faegheh Hasibi, Fedor Nikolaev, Chenyan Xiong, Krisztian Balog, Svein Erik Bratsberg, Alexander Kotov, Jamie Callan |
| 2017 | SIGIR | Natural Language Supported Relation Matching for Question Answering with Knowledge Graphs. | Hongyu Li, Chenyan Xiong, Jamie Callan |
| 2017 | SIGIR | Word-Entity Duet Representations for Document Ranking. | Chenyan Xiong, Jamie Callan, Tie-Yan Liu |
| 2017 | SIGIR | End-to-End Neural Ad-hoc Ranking with Kernel Pooling. | Chenyan Xiong, Zhuyun Dai, Jamie Callan, Zhiyuan Liu, Russell Power |
| 2017 | SIGIR | De-duping URLs with Sequence-to-Sequence Neural Networks. | Keyang Xu, Zhengzhong Liu, Jamie Callan |
| 2016 | CIKM | Query-Biased Partitioning for Selective Search. | Zhuyun Dai, Chenyan Xiong, Jamie Callan |
| 2016 | ECIR | Does Selective Search Benefit from WAND Optimization? | Yubin Kim, Jamie Callan, J. Shane Culpepper, Alistair Moffat |
| 2016 | ECIR | Toward Reproducible Baselines: The Open-Source IR Reproducibility Challenge. | Jimmy Lin, Matt Crane, Andrew Trotman, Jamie Callan, Ishan Chattopadhyaya, John Foley, Grant Ingersoll, Craig MacDonald, Sebastiano Vigna |
| 2016 | ECIR | Jitter Search: A News-Based Real-Time Twitter Search Interface. | Flvio Martins, Joo Magalhes, Jamie Callan |
| 2016 | ICTIR | Bag-of-Entities Representation for Ranking. | Chenyan Xiong, Jamie Callan, Tie-Yan Liu |
| 2016 | SIGIR | An Empirical Study of Learning to Rank for Entity Search. | Jing Chen, Chenyan Xiong, Jamie Callan |
| 2016 | SIGIR | Load-Balancing in Distributed Selective Search. | Yubin Kim, Jamie Callan, J. Shane Culpepper, Alistair Moffat |
| 2016 | WSDM | Barbara Made the News: Mining the Behavior of Crowds for Time-Aware Learning to Rank. | Flvio Martins, Joo Magalhes, Jamie Callan |
| 2015 | CIKM | EsdRank: Connecting Query and Documents through External Semi-Structured Data. | Chenyan Xiong, Jamie Callan |
| 2015 | ICTIR | Query Expansion with Freebase. | Chenyan Xiong, Jamie Callan |
| 2015 | ICWSM | Moving from Static to Dynamic Modeling of Expertise for Question Routing in CQA Sites. | Reyyan Yeniterzi, Jamie Callan |
| 2015 | SIGIR | How Random Decisions Affect Selective Distributed Search. | Zhuyun Dai, Yubin Kim, Jamie Callan |
| 2015 | SIGIR | Learning to Reweight Terms with Distributed Representations. | Guoqing Zheng, Jamie Callan |
| 2014 | SIGIR | An annotation similarity model in passage ranking for historical fact validation. | Jun Araki, Jamie Callan |
| 2014 | SIGIR | A language modeling approach to entity recognition and disambiguation for search queries. | Bhavana Bharat Dalvi, Chenyan Xiong, Jamie Callan |
| 2014 | SIGIR | Analyzing bias in CQA-based expert finding test sets. | Reyyan Yeniterzi, Jamie Callan |
| 2014 | SIGIR | Constructing effective and efficient topic-specific authority networks for expert finding in social media. | Reyyan Yeniterzi, Jamie Callan |
| 2013 | CIKM | Classifying entities into an incomplete ontology. | Bhavana Dalvi, William W. Cohen, Jamie Callan |
| 2012 | CIKM | Shard ranking and cutoff estimation for topically partitioned collections. | Anagha Kulkarni, Almer S. Tigelaar, Djoerd Hiemstra, Jamie Callan |
| 2012 | NAACL | Collectively Representing Semi-Structured Data from the Web. | Bhavana Dalvi, William W. Cohen, Jamie Callan |
| 2012 | SIGIR | Automatic term mismatch diagnosis for selective query expansion. | Le Zhao, Jamie Callan |
| 2012 | SIGIR | WikiQuery - An Interactive Collaboration Interface for Creating, Storing and Sharing Effective CNF Queries. | Le Zhao, Xiaozhong Liu, Jamie Callan |
| 2012 | WSDM | WebSets: extracting sets of entities from the web using unsupervised information extraction. | Bhavana Bharat Dalvi, William W. Cohen, Jamie Callan |
| 2011 | CIKM | Learning to aggregate vertical results into web search results. | Jaime Arguello, Fernando Diaz, Jamie Callan |
| 2011 | ECIR | A Methodology for Evaluating Aggregated Search Results. | Jaime Arguello, Fernando Diaz, Jamie Callan, Ben Carterette |
| 2010 | CIKM | Search engine support for software applications. | Jamie Callan |
| 2010 | CIKM | Document allocation policies for selective searching of distributed indexes. | Anagha Kulkarni, Jamie Callan |
| 2010 | CIKM | Term necessity prediction. | Le Zhao, Jamie Callan |
| 2010 | SIGIR | Topic-based Index Partitions for Efficient and Effective Selective Search. | Anagha Kulkarni, Jamie Callan |
| 2009 | ACL | A Metric-based Framework for Automatic Taxonomy Induction. | Hui Yang, Jamie Callan |
| 2009 | CIKM | Classification-based resource selection. | Jaime Arguello, Jamie Callan, Fernando Diaz |
| 2009 | CIKM | Effective and efficient structured retrieval. | Le Zhao, Jamie Callan |
| 2009 | SIGIR | Sources of evidence for vertical selection. | Jaime Arguello, Fernando Diaz, Jamie Callan, Jean-Franois Crespo |
| 2009 | SIGIR | Feature selection for automatic taxonomy induction. | Hui Yang, Jamie Callan |
| 2008 | ACL | Dictionary Definitions based Homograph Identification using a Generative Hierarchical Model. | Anagha Kulkarni, Jamie Callan |
| 2008 | CIKM | Metric-based ontology learning. | Hui Yang, Jamie Callan |
| 2008 | CIKM | Learning the distance metric in a personal ontology. | Hui Yang, Jamie Callan |
| 2008 | CIKM | A generative retrieval model for structured documents. | Le Zhao, Jamie Callan |
| 2008 | ICWSM | Document Representation and Query Expansion Models for Blog Recommendation. | Jaime Arguello, Jonathan L. Elsas, Jamie Callan, Jaime G. Carbonell |
| 2008 | ITS | Word Sense Disambiguation for Vocabulary Learning. | Anagha Kulkarni, Michael Heilman, Maxine Esknazi, Jamie Callan |
| 2008 | SIGIR | Retrieval and feedback models for blog feed search. | Jonathan L. Elsas, Jaime Arguello, Jamie Callan, Jaime G. Carbonell |
| 2008 | SIGIR | The impact of history length on personalized search. | Yangbo Zhu, Jamie Callan, Jaime G. Carbonell |
| 2007 | NAACL | Automatic and Human Scoring of Word Definition Responses. | Kevyn Collins-Thompson, Jamie Callan |
| 2007 | NAACL | Combining Lexical and Grammatical Features to Improve Readability Measures for First and Second Language Texts. | Michael Heilman, Kevyn Collins-Thompson, Jamie Callan, Maxine Esknazi |
| 2007 | SIGIR | Structured retrieval for question answering. | Matthew W. Bilotti, Paul Ogilvie, Jamie Callan, Eric Nyberg |
| 2007 | SIGIR | Estimation and use of uncertainty in pseudo-relevance feedback. | Kevyn Collins-Thompson, Jamie Callan |
| 2006 | CIKM | Incremental hierarchical clustering of text documents. | Nachiketa Sahoo, Jamie Callan, Ramayya Krishnan, George T. Duncan, Rema Padman |
| 2006 | Interspeech | Classroom success of an intelligent tutoring system for lexical practice and reading comprehension. | Michael Heilman, Kevyn Collins-Thompson, Jamie Callan, Maxine Esknazi |
| 2005 | CIKM | Query expansion using random walk models. | Kevyn Collins-Thompson, Jamie Callan |
| 2005 | ECIR | Federated Search of Text-Based Digital Libraries in Hierarchical Peer-to-Peer Networks. | Jie Lu, Jamie Callan |
| 2005 | NAACL | Combining Multiple Forms of Evidence While Filtering. | Yi Zhang, Jamie Callan |
| 2005 | SIGIR | Modeling search engine effectiveness for federated search. | Luo Si, Jamie Callan |
| 2004 | CIKM | The robustness of content-based search in hierarchical peer to peer networks. | M. Elena Renda, Jamie Callan |
| 2004 | SIGIR | Information retrieval for language tutoring: an overview of the REAP project. | Kevyn Collins-Thompson, Jamie Callan |
| 2004 | SIGIR | The effect of document retrieval quality on factoid question answering performance. | Kevyn Collins-Thompson, Jamie Callan, Egidio L. Terra, Charles L. A. Clarke |
| 2004 | SIGIR | Merging retrieval results in hierarchical peer-to-peer networks. | Jie Lu, Jamie Callan |
| 2004 | SIGIR | Federated Search of Text-Based Digital Libraries in Hierarchical Peer-to-Peer Networks. | Jie Lu, Jamie Callan |
| 2004 | SIGIR | Effect of varying number of documents in blind feedback: analysis of the 2003 NRRC RIA workshop "bf_numdocs" experiment suite. | Jesse Montgomery, Luo Si, Jamie Callan, David A. Evans |
| 2003 | SIGIR | The Effect of Database Size Distribution on Resource Selection Algorithms. | Luo Si, Jamie Callan |