Environmental investments and firm's productivity: a closer look

In this paper we investigate the relationship between investments in environmentally-oriented equipment and firms’ productivity. Drawing on Porter hypothesis, we estimate the impact of capitalembodied environmental innovations on the level of firm productive efficiency (TFP), distinguishing between investments aimed at reducing the environmental impact of production (Target 1) and investments aimed at reducing the use of raw materials (Target 2). Relying on a rich firm-level dataset on Italian manufacturing, and using a quantile regression approach, we show that Target 1 investments enhance the TFP level of low-performing firms, whereas the productivity effect of Target 2 investments concerns medium-high performing firms. When interacted, the two targets show an additive positive short-term effect on productivity for medium-low, medium and medium-high performing firms. This effect partially vanishes through time.