We present a model of altruistically-minded-yet rational-players contributing to a public good. A key feature is the tension between altruism and "crowding-out" effects (players' efforts are strategic substitutes). We find that more altruistic behaviour can raise or reduce welfare, depending on...

we evaluate a recent u.s. initiative to include the social cost of carbon (sCc) in regulatory decisions. To our knowledge, this paper provides the first systematic test of the extent to which applying the SCC has affected national policy. we examine all economically significant federal...