1. Introduction Thomas Olander; 2. Methodology in linguistic subgrouping James Clackson; 3. Computational approaches to linguistic chronology and subgrouping Dariusz Piwowarczyk; 4. What we can (and can't) learn from computational cladistics Don Ringe; 5. Anatolian Alwin Kloekhorst; 6. Tocharian Michaël Peyrot; 7. Italo-Celtic Michael Weiss; 8. Italic Michael Weiss; 9. Celtic Anders Richardt Jørgensen; 10. Germanic Bjarne Simmelkjær Sandgaard Hansen & Guus Jan Kroonen; 11. Greek Lucien van Beek; 12. Armenian Birgit Anette Olsen & Rasmus Thorsø; 13. Albanian Adam Hyllested & Brian D. Joseph; 14. Indo-Iranian Martin Joachim Kümmel; 15. Balto-Slavic Tijmen Pronk.