Individuals hold and exchange opinions over multiple issues. However, a unidimensional spectrum is often enough to represent all those. As our theoretical and experimental results indicate, opinion differences can reduce to disagreement on a single dimension when individuals communicate and...

We study a coordination game where N players simultaneously and independently decide whether to take a certain action or not. Players' payoffs depend only on how many players take each action (i.e., the coalition size) and there is incomplete information on players' types: "Dominant" types have...