Specifically looking for how Energy Star and other regulatory changes have driven appliance manufacturers to make improvements in their technologies to keep up with the requirements or consumer wants/needs. The article needs to include specific historical events and dates to layout a timeline of the key things which have happened (such as the introduction of the Maytag Neptune Washer in 1997). I really need a reference to a journal or internet article. I won’t pick yours as best answer without an article reference.