Does trade within a country affect welfare and productivity? What are the magnitude and consequences of costs to such trade? To answer these questions, we exploit unique Canadian data to measure internal trade costs in a variety of ways – they are large, and vary across sectors and...

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...

Like trade between countries, trade within countries is costly; unlike between countries, gains from trade within countries depend on migration and taxes, as gains through higher wages have tax consequences that gains through lower prices do not. We confirm the first point and flexibly measure...

Does trade within a country affect welfare and productivity? What are the magnitude and consequences of costs to such trade? To answer these questions, we exploit unique Canadian data to measure internal trade costs in a variety of ways – they are large, and vary across sectors and...