Emission Targets and Equilibrium Choice of Technique

We study the technological pre-conditions for a cost-minimizing choice of technique in the presence of government emission targets on by- products of production. Whether a by-product is a desirable commodity or an undesirable pollutant is determined endogeneously as part of the price-quantity equilibrium solution. Non-trivial counter-examples highlight the potential risk of over-ambitious pollution targets. We show that pollution targets can be supported by the appropriate taxes providing that technology allows for a certain type of labour-intensive pollution abatement activities. Our proof is constructive: the tax equilibria we posit can be computed by the Lemke Complementary Pivoting Algorithm.