Accordingly, BT guarantees only envy-freeness - it does not guarantee equitability or Pareto-optimality. They compared the procedures performance in terms of efficiency, envy-freeness, equitability and truthfulness. We must also be wary of equitability. A third, less common criterion is "equitability" (EQ). The surplus procedure (SP) achieves a more complex variant called proportional equitability. This law established equitability for both men and women sports.