The Half Median Salary, A Toy for Defining Poverty?: In France, the commonly accepted definition of (economic) poverty level is a relative measure, half the median salary. Computer simulations permit us to question the pertinence of this criteria and show, on one hand, that the poverty level and the rate of exit from poverty cannot be evaluated by themselves but in relation to the salary structure of the entire population and also in relation to the structure of salary movements, even though this is not often rendered explicit in work on poverty. On the other hand, there are other statistical indicators which could better describe the phenomenon of poverty.