Previous studies have shown that, not only countries, but also regions have a preference to trade within their administrative borders. Using unique trade flows data, we also find a large home bias in Spanish intranational trade. However, we show that this home bias tends to disappear once we...

We use migration-trade data from Italian, Portuguese and Spanish provinces to examine the importance of geographic proximity in the effectiveness of ethnic networks on bilateral trade. Empirical findings from the gravity model show that the migration-trade link is clearly in-province: exports...