Baumgartner, Christoph; Srhoj, Stjepan; Walde, Janette F. - In: Jahrbücher für Nationalökonomie und Statistik 243 (2023) 6, pp. 643-662
Firm-product data provide information for various research questions in international trade, industrial or innovation economics. However, working with these data requires harmonizing product classifications consistently over time to avoid internal validity issues. Harmonization is required...