We provide a systematic decomposition of world trade using harmonized bilateral flows at the most available detail (some 5,000 product categories), into three trade types: inter-industry, intra-industry in horizontally and in vertically differentiated products. The analysis is diachronic and...

North-South competition in quality: Analyzing a new database that makes it possible to disaggregate trade flows across many countries according to unit values, we show that international specialization in terms of quality within industries and product categories plays an important role in the...

Recent works in trade theory and related empirical studies have drawn a revised picture of trade patterns: international specialisation has been proved to take place within products, across varieties, rather than across products or across industries. Systematising this repeated empirical...

Since Gabaix (2011), the role of changes in the performance of some very large firms in shaping aggregate outcomes has been intensively studied in the economic literature. Changes in the performance of a few large firms can arise due to idiosyncratic shocks or idiosyncratic reactions to common...