Socially responsible investors (SRIs) have long addressed issues that fall under the umbrella of slavery... Jolene Smith, executive director of Free the Slaves...[says] slavery...[hides] from scrutiny far down the supply chain where raw materials originate--primarily in farm fields and mines... [Lauren Compere of Boston Common Asset Management] told SocialFunds.com, "[Companies & social investors] don't have a good mechanism in place for monitoring and auditing even first or second tier suppliers, never mind reaching down to the bottom of the supply chain."... January 2006 saw the launch of the Athens Ethical Principles, a set of seven commitments including zero tolerance for human trafficking. Signatories include Manpower, Procter & Gamble, and Microsoft operations in the Czech Republic. [also refers to Toyota]