Summary Porter's hypothesis that a national leadership in environmental policy can increase the international competitiveness of domestic industries is analyzed in a two-period model with Cournot competition. It is assumed that an environmentally friendly technology leads to a decrease of unit...

In standard models on negligence rules, due care levels can be used for fine-tuning the care levels of potential injurers, and there are good arguments why care levels should vary among different fields. We extend the analysis of the impact of due care on care actually chosen to situations where...