[3] In subsequent years, he worked as a computer instructor, programmer and system analyst, returning to Bloomington in 1996 as a Visiting Scholar at Indiana University's Robert F. Byrnes Russian and East European Institute.
"[8] She similarly accepted the evidence presented by Halperin, Borisov, Kuchkin and others that certain texts, claiming that the Battle of Kulikovo represented a "nationally unified campaign for independence from Mongol suzerainty", were not written until the 15th century; instead the larger conflict of the Great Troubles was primarily one of dynastic struggle amongst the Mongol-Tatar elite, while a competition for the timely delivery of tribute payments amongst their Rus' vassals.
[10] Halperin has engaged in a years-long but amicable public debate with Ukrainian historian Serhii Plokhy about the translatio of the Rus' land from the Middle Dnieper to Suzdalia.
[11][12] In his book The Origin of the Slavic Nations (2006), Plokhy said he has found their discussions 'very helpful',[13] was convinced by several of Halperin's arguments,[14] and recommended his papers on 15th-century Tverian political thought (1997)[15] and Russian historiography on the Golden Horde (2004).
'[17] He acknowlegded Plokhy's point that he needed to revise some of his earlier publications in which he had used the unreliable reconstruction of the Trinity Chronicle for dating purposes, which Halperin (2001) himself told fellow scholars to stop doing.