He is an active researcher in the area of opinion spam, sentiment analysis and Web mining. He is the lead author behind several influential works on opinion spam research. These include group opinion spam, commercial fake re-view filters (e.g., Yelp), and various statistical models for detecting singular opinion spammers, burstiness patterns, and campaign. His work on opinion mining including deception detection have also received significant media attention (e.g., ACM Tech News, NYTimes, LATimes, Business Week, CNet, etc). Mukherjee has also served as program committee members of WWW, ACL, EMNLP, and IJCNLP.