We examine the e®ect of an emission tax when the abatement good or service is supplied by an imperfectly competitive eco-industry with free entry. We show that a higher tax always increases the number of ¯rms in the eco-industry whereas it has an ambiguous e®ect on indi- vidual and total...

The welfare implications of a merger in an environment industry (i.e. the industry that supplies abatement goods and services) are considered in a Cournot-Nash context. The traditional analysis of mergers is extended in two ways. First, we examine how the environmental policy may affect the...

This paper considers the welfare and policy implications of a merger between environment firms (i.e., firms managing environmental resources or supplying pollution abatement goods and services). The traditional analysis of mergers in Cournot oligopolies is extended in two ways. First, we show...