ACEEE, Nov. 13, 2016, by Marti Frank.
http://aceee.org/blog/2016/11/how-residential-utility-programs

"Many energy efficiency programs are designed around measures rather than people. These “untargeted” programs focus on meeting energy savings and cost-effectiveness goals, and are ostensibly impartial about the characteristics of the households that receive the offering. Our new examination of program demographics shows how, in practice, untargeted programs often limit participant diversity."