He previously worked as a researcher at AT&T Labs and AT&T Bell Labs, and as an assistant professor at Massachusetts Institute of Technology’s Sloan School of Management. He received his master’s and Ph.D. degrees in electrical engineering and computer science from MIT, and a bachelor’s degree in mathematics from the University of Michigan. Professor Resnick’s research focuses on sociotechnical capital, productive social relations that are enabled by the ongoing use of information and communication technology. He was a pioneer in the field of recommender systems (sometimes called collaborative filtering or social filtering). Recommender systems guide people to interesting materials based on recommendations from other people. His current research focuses on reputation systems, which apply the ideas of recommender systems to evaluating people.