[eng] The deficit in collective-goods financing raises the issue of individual responsibility in groups and societies. Can a tax policy that strengthens individual responsibility reduce free-riding behavior ? We use experimental data to compare the efficiency of two tax policies aimed at...

[eng] When collective agreements apply to all unionised and non-unionised employees , what is the rationale behind joining a union ? The paper presents an experiment on a two-stage game . In the first stage , the decision to join a union is modelled as a voluntary contribution to a public good ....