How do people make investment decisions when they receive outcome feedback? We examinedhow well the standard mean-variance model and two reinforcement models predict people’sportfolio decisions. The basic reinforcement model predicts a learning process that relies solelyon the portfolio’s...

Our objective in this paper is to assess the acceptability of the ambient tax. Concretely,we ask subjects to choose between (A) an ambient tax and (B) an individual tax system. Incase (A), they actually participate in a game in which their payout depends on all participants'decisions and on...