This tool quantifies power dynamics within voting systems, assigning each voter a numerical index representing their influence over potential outcomes. Consider a committee of three members where one possesses veto power. A simple majority vote suggests equal influence, but a deeper analysis reveals the veto holder wields significantly more power. This tool would expose that disparity by assigning a higher numerical value to the veto-wielding member and lower, but equal, values to the other two.
Understanding power distribution is crucial for fair representation and effective decision-making in various contexts, ranging from corporate boards to legislative bodies. Developed by Lloyd Shapley and Martin Shubik, this methodology provides an objective measure of influence, moving beyond simple voting weights to consider all possible voting coalitions. This allows for a more nuanced understanding of how individual votes contribute to collective decisions, particularly in scenarios with complex voting rules or unequal voting rights.