Introduction : firm heterogeneity, international economics, and international business -- 1. International business theory for international economists / Alan M. Rugman and Quyen T.K. Nguyen -- 2. Exports versus foreign direct investments / Filomena Pietrovito, Alberto Fracon Pozzolo, and Luca Salvatici -- 3. Managerial characteristics and the export decision of firms / David Sala and Erdal Yalcin -- 4. Foreign firms and local communities -- 5. Institutional quality and FDI to the South / Julia Darby, Rodolphe Desbordes, and Ian Wooton -- 6. Heterogeneous export spillovers to Chinese domestic firms / Florian Mayneris and Sandra Poncet -- 7. Intrafirm and arm's-length trade / Pamel Bombarda -- 8. Make or buy : on the organizational structure of firms with asymmetrical suppliers / Verena Nowak, Christian Schwartz, and Jene Suedekum -- 9. Global value chains during the Great Trade Collapse / Carlo Altomonte [and 4 others] -- 10. Multinationals' technology transfers and firms' performance / María García-Vega and Elena Huergo -- 11. Innovation offshoring and inventor substitution / Roger Smeets and Laura Abramovsky -- 12. Heterogeneous firms, trade, and economic policy / Michael Pflüger and Stephan Russek.