We study approval voting in a setting with a fixed profile of individuals choices and variable societies. Four properties each linking choices made by a group of individuals to choices by its various subgroups are introduced, and are used for characterizing approval voting

Green technology innovation (GTI) has become a basic force for promoting energy development transformation. China must play the role of the first driving force of GTI to achieve low-carbon sustainable development. Based on the relevant panel data of 30 Mainland Chinese provinces from 2007 to...