We study a model in which a group of agents make a sequence of collective decisions on whether to remain in the current state of the system or switch to an alternative state, as proposed by one of them. Examples for instantiations of this model include the step-wise refinement of a bill of law...

Why do people make deontological decisions, although they often lead to overall unfavorableoutcomes? One account is receiving considerable attention: deontological judgmentsmay signal commitment to prosociality and thus may increase people's chances of beingselected as social partners–which...

In a classical voting situation, each voter in a group is asked to report a ranking over a set of alternatives, and a voting rule is applied to determine a winning alternative. But voters may also hold approval preferences, giving rise to an approval winner. If voters with approval preferences...