  In this paper, we estimate the causal impact (i.e. Average Treatment Effect,
ATT) of the EU ETS on GHG emissions and firm competitiveness (primarily
measured by employment, turnover, and exports levels) by combining a
difference-in-differences approach with semi-parametric matching techniques and
estimators an to investigate the effect of the EU ETS on the economic
performance of these German manufacturing firms using a Stochastic Production
Frontier model.
