From the Editor

This article revises the thesis that exporting firms learn to be more innovative and efficient as they have contact with certain information flows from their foreign activity. It begins by exploring the connections between two concepts: self-selection and learning-by-exporting. The study proceeds with a comparative analysis of the most recent literature and presents common facts and key issues still open to debate. Learning-by-exporting should be measured directly using firms' innovative performance. Given the lack of suitable data on firms' innovative activities, most studies—although without consensus—have followed an indirect approach using productivity measures.