Hart and Sharfman (2012)
Hart, Timothy A., and Mark Sharfman. "Assessing the concurrent validity of the revised Kinder, Lydenberg, and Domini corporate social performance indicators." Business and Society, September 2012.
From the author's abstract: "Because KLD [has] changed its evaluation methods to richer approaches, a new look at the concurrent validity of the [KLD STATS] indicators is necessary. [We] examine the new “Binary” and “Continuous” versions of the KLD and compare them with previous versions of KLD. The results suggest that the continuous scores provide better measurement characteristics than do the binary version. Overall, the new versions of the KLD data demonstrate concurrent validity with the original version."