We provide a theoretical justification for bi-sourcing, which refers to thesituation where a final goods producer buys an input from an outside supplier and alsoproduces it in-house. Bi-sourcing occurs if the marginal cost of producing the input inhouseis higher than the marginal cost of outside...

This paper shows that although small or nancially constrained environmentalistgroups may be in a weak position, relative to polluting industries, in the directcompetition for political inuence, they can compete indirectly through changingpublic preferences over environmental quality. However, in...