Microeconometric Studies of Firms' Imports and Exports spans twenty-four papers with a focus on four topics: applications of advanced microeconometric methods for cross-section and panel data of internationally active firms; cross-country studies using comparable data for firms; studies of exports by business services firms; and new evidence on German firms' trade in goods from transaction data. Applications focus on Germany, the third-largest exporter and importer of goods in the world. Some of these papers are "classic" empirical studies that helped to shape the field of microeconometrics in international trade and are widely cited. The two final papers are hitherto unpublished and include new material. Applications focus on Germany, the third-largest exporter and importer of goods in the world.