A general collective decision problem is analysed. It consists in many issues that are interconnected in two ways: by mutual constraints and by connections of relevance. The goal is to decide on the issues by respecting the mutual constraints and by aggregating in accordance with an...

A population''s level of terrorism depends on two factors: people''s preferences (would they like creating damage?) and the constraints under which people act (what damage could they create, and at what punishment?). Cause-related policies, e.g. improving social stability or education, aim at...