The purpose of this paper is to investigate whether trade policy always switches from export subsidy to export tax if firms engage in Bertrand competition instead of Cournot competitition with trade between two countries.

The purpose of this paper is to analyze the role of anenergy tax on technical improvements and on prices ofconsumer durables induced by strategic competition inenergy efficiency. If the gasoline tax is raised thisdoes in principle not affect the producers of carsbecause the motorist pays for it...

Increasing environmental awareness may affect the pleasure of consuming a good for which an environmental friendly substitute is available. When deciding to buy differentiated products, a compromise is sometimes made between preferred characteristics of the good and its environmental properties....

The objective of our approach is to develop a model which captures horizontal product differentiation under environmental awareness, product innovation under network effects, and price competition whereby environmentally friendly products are costlier to produce. As an example, we refer to...