Using a stacked differences-in-differences approach, we study the effects of Low Emission Zones (LEZs) in Germany. The implementation of stage 1 and 2 LEZs, which banned the most pollution-intensive vehicles from city centers, significantly reduced PM10 concentrations. The most restrictive third...

Environmental regulations (ER) can support or dissuade the reduction of carbon emissions. However, there are limited studies on the impact of ER on carbon emissions for the transportation infrastructure. Using provincial panel data from China for the period 2001-2017, this study measures how ER...