About Jay Jasanoff
Born 1942. Jay Jasanoff is a linguist, philologist and university teacher.
Jay Harold Jasanoff ( or ) is an American linguist and Indo-Europeanist, best known for his h2e-conjugation theory of the Proto-Indo-European verbal system. He teaches Indo-European linguistics and historical linguistics at Harvard University.
Career Jasanoff received both his bachelor's degree (in 1963) and his Ph.D. (in 1968) from Harvard. After working for one year as an assistant professor at the University of California, Berkeley, he returned to Harvard to teach as an assistant professor and, later, associate professor from 1970 to 1978. He then moved to Ithaca, New York, to teach at Cornell University, where he was promoted to full professor in linguistics. He taught at Cornell for twenty years, including a number of years as the department chair. Since 1998 he has been the Diebold Professor of Indo-European Linguistics and Philology at Harvard, and was the department chair from 1999 to 2008.
In his research, he has examined, in addition to the Indo-European verb, such issues as the origin of the Balto-Slavic pitch accent and the internal reconstruction of the earliest stages of the Proto-Indo-European language.
Research Jasanoffâs research since the 1970s has focused on Indo-European verbal morphology, especially the reconstruction of the Proto-Indo-European middle endings (âproto-middleâ). In addition to the Indo-European verb, he has treated such issues as the origin of the Balto-Slavic pitch accent, Germanic and Celtic nominal morphology, and the internal reconstruction of the earliest stages of the Proto-Indo-European language. He has emphasized the importance of the Hittite and Tocharian evidence for Proto-Indo-European reconstruction, as these languages were not available to 19th century Indo-Europeanist reconstruction. His research has contributed to integrating Hittite and Tocharian verbal morphology into the reconstruction of the Indo-European verbal system, though he emphasizes that âthe post-h2e-conjugation model of the PIE verb is (âŠ) in many respects extremely conservativeâ and âThe novelty of the ânewâ system is entirely at the formal level.â and has been generally well-received.
The h2e-conjugation theory
Jasanoff has argued that certain ablaut properties and inflectional endings found in the Hittite and Tocharian verbal systems require the revision of the traditionally reconstructed middle endings and their relationship with the endings of the PIE perfect and the thematic conjugation. Specifically, he proposes that the PIE inflectional endings for the primary (nonpast) active and middle should be reconstructed as follows: +Primary athematic active & middle sg. and pl. endings, ânew modelâ (Jasanoff 2003) Jasanoff has also argued for proto-middle *h2e-conjugation aorists with o/e-ablaut (later o/Ăž-ablaut) of the root, which gave rise to the Indo-Iranian passive aorist and the Tocharian subjunctive V, among others.
The sigmatic aorist After Anatolian and Tocharian split off, the third singular active form became the starting point for the development of the âclassicalâ s-aorist found in Indo-Iranian, Greek, Latin, etc. This reconstruction is elaborated and defended in Jasanoff (2019). both of Eastern European Jewish descent. He has a younger sister, Joan Reyna. His wife, Sheila Jasanoff, is a professor at the Harvard Kennedy School. His son, Alan Jasanoff, is a neuroscientist at MIT, and his daughter, Maya Jasanoff, is a professor in the Department of History at Harvard.
Publications
Books Stative and Middle in Indo-European. Innsbrucker BeitrĂ€ge zur Sprachwissenschaft 23. Innsbruck: Institut fĂŒr Sprachwissenschaft, 1978. . MĂr Curad. Studies Presented to Calvert Watkins, edited by Jay Jasanoff, H. Craig Melchert, and Lisi Oliver. Innsbrucker BeitrĂ€ge zur Sprachwissenschaft 92. Innsbruck: Institut fĂŒr Sprachwissenschaft, 1998. . Harvard Working Papers in Linguistics, vol. 8, edited by Cedric Boeckx, Claire Bowern and Jay Jasanoff. Cambridge, MA, 2003. Hittite and the Indo-European Verb. OxfordâNew York: Oxford University Press, 2003. . The Prehistory of the Balto-Slavic Accent. LeidenâBoston: Brill, 2017.
Selected articles
"The sigmatic forms of the Hittite verb". Indo-European Linguistics 7 (2019), 13-71. "What happened to the perfect in Hittite? A contribution to the theory of the h2e-conjugation". In Elisabeth Rieken (ed.), Morphosyntaktische Kategorien in Sprachgeschichte und Forschung: Akten der Arbeitstagung der Indogermanischen Gesellschaft vom 21. bis 23. September 2015 in Marburg (Wiesbaden: Reichert, 2018), 137â156. "The phonology of Tocharian B okso âoxâ". In Lucien Beek, Alwin Kloekhorst, Guus Kroonen, MichaĂ«l Peyrot & Tijmen Pronk (eds.), Farnah. Indo-Iranian and Indo-European Studies in Honor of Sasha Lubotsky (Ann Arbor: Beech Stave, 2018), 72â76. "The Tocharian subjunctive and preterite in *-a-". In Adam I. Cooper, Jeremy Rau & Michael Weiss (eds.), Multi Nominis Grammaticus: Studies in Classical and Indo-European Linguistics in Honor of Alan J. Nussbaum on the Occasion of his Sixty-fifth Birthday (Ann Arbor: Beech Stave, 2013), 105-120. "The accentual type *vĂšdĆ, *vedetĂ and the origin of mobility in the Balto-Slavic verb", Baltistica 43/3 (2008), 339-379. "The ending of the PIE 2 sg. middle imperative", Die Sprache 46 (2006 ), 203-212. "From reduplication to ablaut: the class VII strong verbs of Northwest Germanic", Historische Sprachforschung 120 (2007), 241-284. "Balto-Slavic accentuation: telling news from noise", Baltistica 39/2 (2004), 171-177. "'Stative' *-Ä- revisited", Die Sprache 43 (2002-03 ), 127-170. "Some relative forms of the verb in Old Irish". In Heiner Eichner & Hans Christian LuschĂŒtzky (eds.), Compositiones Indogermanicae: In Memoriam Jochem Schindler (Prague: Enigma, 1999), 205-222. "The thematic conjugation revisited". In Jay Jasanoff, H. Craig Melchert & Lisi Oliver (eds.), MĂr Curad. Studies in Honor of Calvert Watkins (Innsbruck: Institut fĂŒr Sprachwissenschaft der UniversitĂ€t Innsbruck, 1998), 301-316. "Aspects of the internal history of the PIE verbal system". In George E. Dunkel, Gisela Meyer, Salvatore Scarlata & Christian Seidl (eds.), FrĂŒh-, Mittel-, und SpĂ€tindogermanisch. Akten der IX. Fachtagung der Indogermanischen Gesellschaft vom 5. bis 9. Oktober 1992 in ZĂŒrich (Wiesbaden: Reichert,1994), 149-168. "The ablaut of the root aorist optative in Proto-Indo-European", MĂŒnchener Studien zur Sprachwissenschaft 52 (1991), 101-122. "Old Irish bĂ© 'woman'", Ăriu 40 (1989), 135-141. "Language and gender in the Tarim Basin: the Tocharian 1 sg. pronoun", Tocharian and Indo-European Studies 3 (1989), 125-148. "The r-endings of the IE middle," Die Sprache 24 (1977), 159-170. "The Germanic third weak class", Language 49 (1973), 850-870.
Donât just read it â
keep it.
Full-length biographies made to live with: read them, listen on the way to work, watch them tonight.
- E-book
- Audio
- Video
Instant download · yours to keep · every purchase keeps this site free
Important facts
Family & relationships
People in Jay Jasanoff's life
Named in this biography and alive at the same time
Contemporaries
People whose lives overlapped Jay Jasanoff's
Frequently asked questions
Who is Jay Jasanoff?
American linguist
When was Jay Jasanoff born?
Jay Jasanoff was born on 12 June 1942.
What is Jay Jasanoff's occupation?
Jay Jasanoff is a linguist, philologist and university teacher.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). Jay Jasanoff. https://biography.guide/jay-jasanoff/
MLA: "Jay Jasanoff." Biography.guide, https://biography.guide/jay-jasanoff/.
Chicago: "Jay Jasanoff." Biography.guide. https://biography.guide/jay-jasanoff/.
Data last updated: 2026-09-20 · Spot an error? Report a correction.
Page generated 2026-09-27 04:58 UTC