"In a world of imperfect information, reputations often guide the sequential decisions to trust and to reward trust. We consider two-player situations, where the trusted player, called the temptee, has a temptation to betray. The strength of the temptation to betray varies from encounter to...

There is a low but uncertain probability that climate change could trigger "mega-catastrophes," severe and at least partly irreversible adverse effects across broad regions. This paper first discusses the state of current knowledge and the defining characteristics of potential climate change...