different voting systems within the same parliamentary body. This paper analyzes the core and the Shapley value of three …-valued simple games. Using the concept of vital players, the vital core is constructed and we show that the vital core is a subset … of the core. The Shapley value is characterized on the class of all three-valued simple games. The model is applied to …

-empty core: the Direct Price solution is both a core element and a marginal vector. It is seen that the nucleolus of an MCP …