“…The lower bound LB for the distribution of the efficiency gain G is that point in the solution space R ³0 N , in which the minimum allocable share v n.min of the efficiency gain G is assigned to each actor A n with n = 1,...,N. The lower bound LB is often called the threat point (Kuhn et al, 1996); in the τ-value literature especially, it is called minimal right vector (Bilbao et al, 2002;Tijs, 1981).…”