“…In the New Hampshire and Massachusetts retail competition pilot programs, a variety of energy-efficiency rebates, products, and services were offered to residential and commercial customers (either for a fee or as sign-up or participation incentives) (Holt and Fang 1997;Rothstein and Fang 1997). In California, on the other hand, energy-efficiency products and services have, at least thus far, played a minor role in the residential green product offerings," perhaps because a wider variety of renewable resources are available in California or because energy efficiency appeals to different customer segments than renewable energy.…”