The equilibrium rate rY of a random variable Y with support on non-negative integers is defined by rY(0) = 0 and rY(n) = P[Y = n – 1]/P[Y – n],
Let
(j = 1, …, m; i = 1,2) be 2m independent random variables that have proportional equilibrium rates with
(j = 1, …, m; i = 1, 2) as the constant of proportionality. When the equilibrium rate is increasing and concave [convex] it is shown that
, …,
) majorizes
implies
, …,
for all increasing Schur-convex [concave] functions
whenever the expectations exist. In addition if
, (i = 1, 2), then
