Congress leader Shashi Tharoor on Thursday said that although he did not want to comment on the execution of 1993 Mumbai blasts convict br br Yakub Memon; he believes that death penalty is wrong in principle and practice.br br "I am not commenting on the merits of any case because that is for the Supreme Court to decide. My position is that death penalty is wrong br br in principle and practice. Lots of studies have been conducted which confirm that death penalty has no deterrent effect, statistics also br br suggest that," said Tharoor.