His teaching and research interests laid in comparative studies involving Mesopotamian and Israelite religion, Old Testament prophecy, Semitic languages, and Hebrew lexicography. Recent publications include Nahum, Habakkuk, and Zephaniah (OTL) and a forthcoming collection of essays. Roberts is currently working on a commentary on Isaiah 1-39. He served on the editorial boards of JBL, CBQ, BASOR, and Restoration Quarterly, and was editor of the SBL OT dissertation series and a member of the NRSV translation committee. He was the coeditor of the Princeton Classical Hebrew Lexicon Project.