Economists recognize that monetary incentives can backfire through the crowding-out of moral and social motivations leading to an overall decrease of the desired behavior. We implement a field experiment where participants are asked to fill a questionnaire on pro-environmental behaviors under...

This note incorporates ecological interactions into the Noah's Arch problem [M.L. Weitzman, The Noah's Arch problem, Econometrica 66(6) (1998) 1279-1298]. In doing so, we arrive at a general model for ranking in situ conservation projects accounting for species interrelations and provide an...