Exploring European regional trade
利用新数据集首次系统考察欧洲269个区域在国界内外的贸易模式，发现区域贸易存在强烈的本地和国家偏向，地理距离和国界是重要决定因素，但无法解释本地偏向，而政治区域边界可能是其驱动因素。
We use the new dataset of trade flows across 269 European regions in 24 countries constructed in Santamaría et al. (2020) to systematically explore for the first time trade patterns within and across country borders. We focus on the differences between home trade, country trade and foreign trade. We document the following facts: (i) European regional trade has a strong home and country bias, (ii) geographic distance and national borders are important determinants of regional trade, but cannot explain the strong regional home bias and (iii) the home bias is heterogeneous across regions and seems to be driven by political regional borders.