Marginal contribution
= Marginal contribution
{title2=$\Delta_i(S)=v(S\cup\{i\})-v(S)$}
A player's <marginal contribution> to a <coalition> is the increase in its value when that player joins. In a <convex cooperative game>, <marginal contributions> increase with the preceding <coalition>. Averaging contributions across player orderings gives the <Shapley value>.