social security system and inheritance taxation) in an overlapping generations model with perfect altruism. It generalizes … productivity and altruism. Within such a model wealth is entirely held in the steady-state by the families with the highest degree … of altruism. Under plausible assumptions both public debt and social security are neutral à la Ricardo, while increasing …

migrants regarding non-migrants. We develop a static model of asymmetric information that contrasts altruism, pressure and …

effort. Self-confidence thus enhances motivation, and this gives a time--inconsistent individual a strong incentive to build …

- as stressed by psychologists - in that they undermine intrinsic motivation. As a result, they may be only weak … motivation, while offers of help may create a dependence. More generally, we identify when the hidden costs of rewards are a myth …