Today the AEMC published its draft determination on a Wholesale Demand Response Mechanism. The concept first emerged in the AEMC’s ground-breaking Power of Choice Review in 2011, and was subsequently developed, assessed, rejected, re-emerged and is now on the verge of being imposed on the market. We take a look at what all the fuss is about that has kept it in, and out, and back, in play for so long.