Individuals differ not only by gender and hair color, they also exhibit heterogeneities in various probably not fully genetically determined dimensions as personality, preferences and skills. Moreover, individuals live in different social environments and yield unequal life outcomes as health or...

Poor people often do not make investments, even when returns are high. One possible explanation is that they have low aspirations and form mental models of their future opportunities which ignore some options for investment. This paper reports on a field experiment to test this hypothesis in...