正義党
Alperovich was a member of the centrist Radical Civic Union until 1999, when Bussi failed to achieve re-election and the new Justicialist Party governor, Julio Miranda , appointed Alperovich to be Minister of Economy. Alperovich thereupon switched to the Justicialist Party. His appointment to the ministerial position was part of an agreement that was designed to maintain a channel of communications between the Justicialist Party and the Alliance government of Fernando de la Rúa. Alperovich was elected to the Senate amid the political crisis of 2001, and ran for governor of Tucumán Province in 2003.