In 2004 , Kahn signed a petition .
In 2004 , Kahn threatened to resign from his post as head of the Paris - based , publicly financed Cochin Institute , due to cuts in government spending on research .
In 2004 , Kahn signed a petition and threatened to resign from his post as head of the Paris - based , publicly financed Cochin Institute , due to cuts in government spending on research .