Data for: A mechanism design approach to a buyer's optimal auditing policy to induce responsible sourcing in a supply chain

This supplementary material provides the proof of propositions, theorems, and some extra figures, presented in the article mentioned below: "A mechanism design approach to a buyer's optimal auditing policy to induce responsible sourcing in a supply chain", accepted for publication in the "Journal of Environmental Management". DOI for the paper: https://doi.org/10.1016/j.jenvman.2019.109721