We analyze an overlapping generations model of voting on “reform projects”. These resemble investments in that they first require some investment expenditure and later pay off. Since the time during which old people get the benefit is shorter, or because older people are more wealthy and hence pay more taxes, they are more conservative (against reforms) than young people. We show that if people...

Abstract Card-based cryptography is a variety of secure multiparty computation (MPC). Recently, new technique called private operations was introduced because the protocol can be implemented with fewer cards than that by using conventional shuffle. For example, Nakai et al. showed if are available, computations AND and OR for two inputs realized simultaneously four cards, applied to four-card m...

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 by means of amendments to be voted on, as well as resource allocation problems, where agents successiv...