The shared ownership by the Clarín Group, La Nación, and the Argentine Government in Papel Prensa (the largest producer of newsprint in Argentina), has also been marked by controversy. The administration alleged that the sale of Papel Prensa by the family of the late David Graiver in 1976 was done so by illicit means and in collusion with the dictatorship. The government presented a report in 2010 claiming that during the Dirty War, while being coerced, the Graivers were forced to sell the newsprint maker at a bargain price. Another source of contention between the government and its private partners in Papel Prensa was a preferential pricing scale that allowed "La Nación" and the Clarín Group's numerous dailies to buy newsprint at a 25% discount while other dailies were charged prices based on expensive Chilean imports; the practice was made illegal in 2010.