(This name uses Eastern Slavic naming customs; the patronymic is Timurovich and the family name is Gaidar.) Yegor Timurovich Gaidar (Russian: Его́р Тиму́рович Гайда́р; pronounced [jɪˈɡor tʲɪˈmurəvʲɪtɕ ɡɐjˈdar]; 19 March 1956 – 16 December 2009) was a Soviet and Russian economist, politician, and author, and was the Acting Prime Minister of Russia from 15 June 1992 to 14 December 1992.