[W]orkshop on the human rights responsibilities of business, being held at Duke University's Kenan Institute for Ethics...The discussion was focused on the "Guiding Principles on Business and Human Rights,"...The hard part, of course, is putting that framework into action, a task that has fallen to a Working Group recently established by the UN, two members of which were at the Duke workshop in an unofficial capacity...Here are three questions—food for thought, really—related to the implementation of a human rights regime intended to apply to transnational corporations...How do human rights fit into the range of other issues related to "business doing the right thing"?...How large does a company have to be in order to have "serious" human rights obligations?...Who will pay for increased monitoring, reporting, and policy-making within particular supply chains? [refers to Coca Cola, Walmart, ExxonMobil, Toyota]