Efficiency of a cooperative-game value
= Efficiency of a cooperative-game value
{title2=$\sum_{i\in N}\psi_i(v)=v(N)$}
= Cooperative-game efficiency
{synonym}
A value assigning a <vector> of <payoffs> $\psi(v)$ to a <transferable utility game> has <cooperative-game efficiency> when it distributes exactly the grand-<coalition> value. This is a budget-total condition; it does not assert membership in the <core of a cooperative game>.