This is an e-companion of "Responsible Sourcing under Supplier-Auditor Collusion" published in Manufacturing & Service Operations Management. It contains Appendix B of the paper, which includes all the results and proofs for Section 6 (Model Extensions)

Using agile supply chains, fast fashion companies have been viewed as best-practice examples in industries. Prior research has focused on how agility can equip such companies with strong "sense and respond" capabilities to identify and fulfill unpredictable customer demands. There is another...

Traceability has become an important feature in supply chain management. It can be adopted to identify the sources of many quality problems. In this paper, we develop a game theoretical model to study the role of traceability in combating product label misconduct. Specifically, we consider an...