- Working out lines of development of ancient and late antique Jewish thought on a philological basis.
- Research into the Tannaitic sources.
- Social and cultural history of rabbinic Judaism.
- Concepts of the soul in rabbinic Judaism
- “sectarian” and “non-sectarian” texts
- Qumranic halakha.
-Semantic development of the Hebrew language, with special focus on Late Biblical Hebrew, Qumran Hebrew, Mishnaic Hebrew