On a new positive dependence concept based on the conditional mean inactivity time order

Directional Dependence Orders of Random Vectors

“…If the inequalities (1) and ( 2) are reversed, then it is said that X is negative upper orthant-dependent (NUOD) and negative lower orthant-dependent (NUOD), respectively. For more details on these and other dependence concepts, see, e.g., [2,3,[5][6][7][8].…”