Although a punishment can be applied only once, the threat to punish can be repeated several times. This is possible because, when parties comply, the punishment is not applied and can thus be used to support a new threat. We refer to this feature of sticks as the "multiplication effect". The...

Given the threats of our current 'risk society', there is an ever-increasing demand for safety regulation to counter the harmful effects of an equally growing number of dangerous activities. Claims for more safety and security abound, ranging from concerns about people killed in traffic...