Firm-level idiosyncratic policy distortions lower aggregate productivity, especially if such distortions are correlated with firm productivity. Many environmental policies, such as energy intensity standards, exhibit this correlation. In contrast to the existing environmental literature...

International trade increases productivity; internal trade should too. The size and consequences of internal trade barriers are unfortunately not well known. Using unique Canadian data and multiple approaches to measure trade costs, we find internal trade barriers are large, especially for poor...